Two characters are in a room having a conversation. One of them makes to leave. But as this character reaches the door, they turn back to deliver a final line. Often this is some bit of exposition that sets up something later in the episode ("the starboard discombobulator's on the fritz") but that the writer couldn't figure out how to work into the scene's main conversation. Other times, during an argument, it's used to reinforce a "The Reason You Suck" Speech with what usually equates to "The Reason I Don't Suck" and/or Arson, Murder, and Jaywalking. In some shows there might be several lines of dialog between the two characters as the departing actor tries desperately not to look as though he's loitering in the doorway.
Just to mix things up a little bit, sometimes they'll do it the other way around: the character who remains in the room will call to the character who's leaving just as the latter reaches the door.
This trope is distinctly different from a good old-fashioned exit line, because the line itself isn't dramatic ("You can't fire me! I quit!") and is often in fact something of a non sequitur, which must be eased into with a phrase like "and another thing", "oh yeah", or "by the way."
Sometimes a character actually gets out the door, then comes back in to deliver a line, but this is usually for comedic effect. See Door Focus.
- Alyosha! leaves the meeting where she tells FBI Katie Lindberg that she's the infamous assassin Kortik saying "There are another two Kortiks beside me.
- In Bakemonogatari, Senjougahara tells Araragi that she has an idea how to help Hachikuji, but she has one more thing to say before they go:
"One more thing, Araragi-kun... I LOVE YOU."
- In the Phoenix Wright Loops Edgeworth comes over to ask Phoenix whether he has a relationship with the caped Pink Princess. Phoenix lies (to keep up The Masquerade) and, satisfied, Edgeworth leaves. It is at this point that the Princess enters through Phoenix's window to have a chat with him.
But before he could begin his tale, the front door suddenly opened. "Excuse me, Wright, but I forgot to tell you..." Edgeworth trailed off when he saw who was now in Phoenix's apartment.
- In Cinderella, the Wicked Stepmother gives the titular heroine a list of chores for her to perform. As Cinderella starts to leave the room, she states "Oh, yes, and one more thing... See that Lucifer gets his bath". Cue Oh, Crap! reaction from Lucifer, who then gives his mistress a Death Glare out of the corner of his eye.
- In Peter Pan, Peter, speaking in the voice of Captain Hook, orders Mr. Smee to return Princess Tiger Lily to the Indians, to which Mr. Smee, thinking it is indeed Hook speaking, says, "Aye-aye, sir." Then Peter adds, "Oh, and one more thing: when you return to the ship, tell the whole crew to help themselves to me best rum."
- She isn't leaving, but in The Emperor's New Groove, Yzma finishes up a rant about how stupid and useless Kronk is with "And another thing! I never liked your spinach puffs! Never!" (This actually motivates Kronk to turn against her.)
- In The Jungle Book, Bagheera is adamant to Baloo that Mowgli should leave the jungle for the man-village, arguing that Baloo cannot possibly take care of Mowgli, if his getting kidnapped by monkeys was any indication. Baloo tries to ignore Bagheera, until the latter further explains why Mowgli should go back to the man-village:
Bagheera: And another thing, sooner or later, Mowgli will meet Shere Khan.
Baloo: [attentive now] The tiger? Well, what's he got against the kid?
Bagheera: He hates man with a vengeance. You know that! He fears man's gun and man's fire.
Baloo: But little Mowgli don't have those things.
Bagheera: Shere Khan won't wait until he does. He'll get Mowgli while he's young and helpless. Just one swipe!
[Bagheera swipes at the air in front of Baloo's face with his claws]
- Old Biff to 1955 Biff in Back to the Future Part II: "There's one more thing. One day, a kid or a crazy old man who claims to be a scientist is going to come around asking...". This is a callback to an earlier point in the film (though it occurs later chronologically), when 1985A Biff says to Marty: "Oh, and he told me one more thing. He said, 'Someday a crazy, wild-eyed scientist,' or a kid may show up asking about that book. 'And if that ever happens...' (pulls out a gun) Funny. I never thought it would be you."
- Carnage would end if the visiting couple left the apartment. They're stopped at the front door or in the hallway outside several times by an invitation, an unresolved question, or just an argument. At least once, the husband (who desperately wants to leave) is left waiting with one foot in the elevator.
- Maggie attempts this in The Great Race, but never gets to finish it as Hezekiah drags her from the tent. She does manage to get in a nice air-kick though.
- Done on the person leaving in The Name of the Rose. The Abbot wants to consult the newly-arrived William of Baskerville about a suspicious death, but has been advised against it. Realising the Abbot has something on his mind, William waits till he's leaving the room before asking about the fresh grave outside. Caught off guard, the abbot ends up asking for William's help anyway.
- Spoofed in A Shot in the Dark with the help of Door Focus: Clouseau leaves Dreyfus' office after an argument, the door closes behind him, and we hear "And another thing!" Since Clouseau doesn't know it closed, he turns around as he says this, points at Dreyfus and thus smashes the frosted glass window in the door. Embarrassed, he leaves without saying whatever that other thing was.
- A Catchphrase of the Wiseman from Sucker Punch.
- Used brilliantly in many of Quentin Tarantino's movies. Uniquely, Tarantino usually uses this trope as a prelude to shit going down.
- Most notably in ''Django Unchained"; it is said verbatim by Candie, leading to an entirely unnecessary yet oh-so-rewarding shootout.
- Likewise in Inglourious Basterds. Major Dieter Hellstrom was about to leave, but then decides he'll just have one last drink with the company before he goes. It doesn't end well.
- It's used by the narrator in The Hateful 8 after the intermission to inform the viewers of a plot point.
- Discworld: Subverted in Men at Arms. Vimes, investigating an explosion at the Assassins' Guild, pulls an And Another Thing... moment to try to get Dr. Cruces, the Guild leader, to admit there was a theft as well. Dr. Cruces, however, doesn't fall for it, and flatly states, "I never said anything was stolen." It's true, he didn't say anything was stolen, but that doesn't mean that nothing was stolen. The key Plot Device was stolen. In fact Vimes expected Cruces to deny anything was stolen — doing so was what confirmed what was stolen was important.
- The Moonstone:
- One of the Indians visits the offices of a couple barristers merely to form an excuse to ask one final question before leaving.
- In Armadale, Mr. Pedgift senior does this all the time.
He invariably kept his strongest argument, or his boldest proposal, to the last, and invariably remembered it at the door (after previously taking his leave), as if it was a purely accidental consideration which had that instant occurred to him. Jocular friends, acquainted by previous experience with this form of proceeding, had given it the name of 'PedgiftsPostscript'.
- Gleefully parodied by Isaac Asimov in his Self-Insert Fic "Murder at the ABA", when his written self gets up after chatting to a colleague about the murder that occurred the day before:
I wish I could do the dramatic thing. I wish that at the last minute I could remember something for you, some little apparently unimportant event that would break the whole case, but I can't do it. But why should that bother you? I was ten feet away and completely busy with my own signings. I'm not your best witness. Why don't you ask what's-her-name?
- A Song of Ice and Fire: Tywin tells Tyrion, "You will not take the whore to court."
- Sherlock Holmes: In A Study in Scarlet, Sherlock knows how to put in his place an overconfident Inspector Lestrade :
"One other thing, Lestrade," he added, turning round at the door: "'Rache,' is the German for 'revenge'; so don't lose your time looking for Miss Rachel". With which Parthian shot he walked away, leaving the two rivals open-mouthed behind him.
- In the Babylon 5 episode "Midnight on the Firing Line", Sinclair finishes his conversation with Kosh and turns to go. Only then does Kosh deliver his opinion on the matter at issue:
Kosh: They are alone. They are a dying people. We should let them pass.
Sinclair: Who? The Narn or the Centauri?
- Perfected by Lieutenant Columbo as a means of turning the screw on a suspect who is already exasperated by Columbo's shenanigans, since an Exasperated Perp is liable to make a crucial mistake. Though this became Columbo's most distinctive character trait, it started as a mistake, with two stories on how it came to be. In one, during the filming of the Columbo pilot, "Prescription Murder", Peter Falk simply forgot to deliver his last line before leaving the set, so he turned around, came back, and said "One more thing..." The take was left in, and became a defining moment. In the other, it was the writers that forgot something they needed Columbo to say, so — this being a time of type-writers — rather than start the script page over they threw in "One more thing".
- Detective Flack did this once on CSI: NY. When he made to leave, the door gave him a Eureka Moment — he realizes that the victim's door had been locked from the outside, so whoever killed him must have had a key.
- Doctor Who: In "Rose", the Doctor does this to Rose twice.
- After their first meeting, the Doctor ushers Rose out of the building and slams the door behind her, then opens it again to exchange the introductions they didn't have time for while being chased by Autons.
- At the end, the Doctor asks Rose to travel with him, but she turns him down, so he leaves, dematerializing the TARDIS. He then returns a moment later, leaning out of the TARDIS to say, "Did I mention it also travels in time?" That persuades her.
- Tywin Lannister from Game of Thrones ends some meetings with an afterthought. His hostile distaste for Tyrion's whoremonging ends two political conversations with his son, and when Tywin is heading for the door after a one-sided audience with King Joffrey, he feels the need to add a last second pleasantry, so he turns back and utters a condescending "Your Grace".
- The Golden Girls, season two, episode 14, "The Actor". Blanche, Rose and Dorothy have just learned the visiting actor they've all been (secretly) dating has been dating each other, as well as other women, and have decided to call him out for it during one of his performances, with Blanche rounding her bit out with:
Blanche: And as God is my witness, I will never shampoo your hair again!
Dorothy: And another thing — you'll never what?!
- Kellerman got a Moment of Awesome in his first case on Homicide: Life on the Street. Interviewing a suspected murderer/arsonist, he tells the suspect that they don't have much of a case beyond what he's already explained away, and that it looks like he's free to go. As the man is grabbing his coat, Kellerman asks, "Why'd you kill the dog?" The man's answer, "I didn't know the dog was there."
- The medical version (the "doorknob question") appeared in House: according to the writers (and presumably their medical consultants), many patients come in for a trivial ailment, and then bring up the "other thing" (probably the serious illness they actually want treatment for, but which embarrasses them) as they reach for the door knob.
- Conversed on In Treatment, where Mia has a tendency to say something important when she's about to leave.
- Likewise, Detective Goren from Law & Order: Criminal Intent, also uses And Another Thing... in the same way as Columbo did.
- Frequently on NCIS, when Gibbs would visit Abby in her forensics lab and she would provide some information. Just as Gibbs is about to leave, Abby then chimes in with, "Wait, there's more," and provide another even more vital clue.
- In the second part of "The Cadillac", Susan Ross, George's fiance, goes to Elaine's apartment to confront Elaine about what she suspects is an affair between Elaine and George (in reality, George was lying so he could go on a date with Marisa Tomei). Initially, the two of them seem to have cleared everything up, as Elaine gave the same story that George gave Susan (that Elaine was having issues with her boyfriend over his importing/exporting business), which pleases Susan, who then turns to leave. As soon as she gets to the door, however, she asks Elaine what the issue is with the business and, since this part of the lie wasn't explained, the lie begins to unravel.
- When George competes for sympathy points against a survivor of the Andrea Doria, he moves the condo board to tears by going through his lifetime of tragedies as a "short, stocky, slow witted, bald man." After concluding, he throws in:
George: ...Oh, and my fiance died from licking toxic envelopes that I picked out. Thank you for your time."
- Done in the third episode of Sherlock. Jim Moriarty tells Watson and Holmes that he isn't going to kill them right now, and leaves, apparently taking his unseen sniper with him. Holmes runs to Watson and gets off the explosive jacket he is wearing, and everyone breathes a sigh of relief... until Moriarty walks back in, the little red dots of death return, and he says he's changed his mind and he can't let them leave after all.
- Star Trek: The Next Generation often raised this to an art form, with whoever Picard was talking with in the ready room would say that one more thing at the door. And the reverse happens just as often, with Picard adding "one more thing" when whoever is in his ready room at the time is almost out the door, especially in the later seasons. In fact, near the end of the series, it's surprising to see anyone coming out of the ready room without Picard adding a comment.
- Star Trek: Deep Space Nine. In the Noir Episode "Necessary Evil", Odo does this while interrogating a Femme Fatale, in an obvious Columbo homage (although Odo's actually a fan of Mickey Spillane).
- Supernatural. Sam Winchester tries this in "Heartache", only to be cut short by the person he's talking to, who is clearly intent on not providing any useful information.
Sam: Just one more question...
Woman: There is always one more question in life, isn't there? That's what I find. [ushers them out]
- In Torchwood, at the end of Episode 1, Season 2 right before John Hart leaves, he tells Jack "Oh yeah, I found Grey."
- Happened on The West Wing too many times to count. Often the plot of an episode relied on one or more of these moments.
- The Legend of Zelda: Phantom Hourglass includes a pirate whom you fight on your ship at least twice. Every time you defeat her, she gives one of these lines - most of them quite lame and irrelevant.
- Granin does this in Metal Gear Solid 3. Snake is leaving, thinking he's done with the drunk scientist, but Granin stops him to give him a key and tells him which way to go.
- At the end of an over half-hour video released in October 2014 that promoted at least fifty things that were to be expected in Super Smash Bros. for Wii U, the announcer said, "Time for a special announcement!" as the video was completely black. Then, it fades into a clip showing a model of Mewtwo being rendered, with the video confirming that the Legendary Pokémon will finally be returning to the series as free DLC in Spring 2014. Smash fans around the world freaked the Hell out.
- Used in combination with Bond One-Liner in Team Fortress 2:
The Engineer, dominating a Heavy: And another thing: You're. Ugly.
- Undertale has this gem:
Sans: by the way... i was going to say something, then i forgot.
- In the court system of Phoenix Wright's setting, witnesses can be held responsible only for what they say while testifying (however obviously dishonest they may be otherwise). Therefore, the Fey method of lawyering involves asking a dishonest witness for more and more details about what they "saw", until that witness trips up and adds a detail incompatible with the rest of their story. Then the lawyer asks politely that they add [innocuous detail] to their official testimony, the witness does, and only then can their deceit be exposed.
- In one of Tex Avery's George and Junior cartoons, George goes into a cave to lure out a chicken and instructs Junior to hit the first thing that comes out. He then turns around to say "And another thing"... and that's when Junior clobbers him.
- There was a Bugs Bunny cartoon where Bugs got a job as an organ grinder's monkey, managing to anger a gorilla in the process. When Bugs is done telling the gorilla off, he adds "And another thing... stop breathing on my cup!"
- Bob Clampett's Tortoise Wins By A Hare (1943) has Bugs disguised as an old timer trying to learn Cecil Turtle's method of beating the hare. His final line (indicating he knew it was Bugs all along): "Another thing... rabbits aren't very bright, either!"
- In one Daffy Duck cartoon, instead of flying south for the winter, Daffy decides to stay over at a random house, but the owner is a Peter Lorre-type mad scientist, who needs a duck's wishbone for an experiment and naturally chooses Daffy. The resultant mad chase ends with Daffy feeling so mistreated that he soundly decides to just leave and tells the scientist so. As he leaves, he stops briefly to tell the scientist, "And another thing... you're a slovenly housekeeper!"
- Clone High did the same in in the premiere, as JFK kept coming back into the bathroom to reiterate the fact that Lincoln and Gandhi weren't invited to his party, and then because "I forgot to wash my hands!"
- In Daria, Daria Morgendorffer's mother and her principal don't get along very well. When they end up in a tent alone together in one of the Class Trip episodes, it looks like they'll be at each other's throats immediately, but the show subverts expectations by showing them to have... a pleasant conversation. An awkward conversation, to be sure, but a pleasant one. Helen ends up (unintentionally) admitting her age and her insecurity about it, and that doesn't escape Ms. Li's notice when, moments later, the scene devolves into a shouting match. As Helen is turning to leave, Ms. Li stops her to say, "And by the way, you look fifty." Helen's mouth turns into an "O" of shock.
- In the Family Guy Return of the Jedi spoof, Yoda continues to give dying gasps saying "Luke..." before sharing information before he finally dies.
- In the Gargoyles episode "Turf", Angela has to tell the Trio off. While they were showing off and generally acting like idiots, the bad guys got away. She tells them that they have to focus on catching the bad guys, she is not a prize to be won, "And one more thing... STOP CALLING ME ANGIE!"
- Uncle from Jackie Chan Adventures easily established "One more thing!" as one of his catchphrases by the end of his first scene in the series.
- In the French version, this is changed to "Je n'ai pas fini!" ("I'm not done yet!"), with similar results.
- Especially funny when the "one more thing" was to smack Jackie in the head.
- In fact, there was one episode in which Tohru actually called him out on this. As a result, the master and the apprentice could no longer do their teamwork, and Tohru was kidnapped. When it happened, Uncle blamed himself while noting his tendency to overrepeat "one more thing" (not without saying "one more thing" before, of course) and whacking himself in the head repeatedly.
- This seems to be something that Uncle picked up as he got older. When he wore the Dog Talisman of immortality in one episode, he regained the vitality and mindset of his youth though his outside appearance remained unchanged. Jade notices that he hasn't said "And one more thing" for a while.
- During one episode of Metalocalypse, Dethklok walks in on a sadistic fashion designer skinning models alive. They can only stand there and scream. Except for Nathan, who makes sure to say:
Nathan Explosion: Oh, my god, what a horri- you're fired, by the way!
- On The Simpsons, Nelson engages in Perp Sweating when he suspects Bart and Lisa of killing Martin. The whole thing is a spoof of Columbo, complete with Nelson engaging in an And Another Thing...
- This trope was parodied mercilessly on South Park with a scene that ended in four successive And Another Things...
- Steven Universe: In "When It Rains", the Crystal Gems are heading out, leaving Steven to hold down the fort, when Garnet remembers something important:
Oh, and one more thing...
- This is a common strategy for stage presentations, to the point where it's become expected. The announcement will usually be the biggest one of the event. Steve Jobs was fond of this, as is Nintendo — The Legend of Zelda: Twilight Princess was famously announced this way.
- Similarly, politicians often leave the "big" reveals until their end of speeches; for example, the 2011 UK budget left a cut in fuel duty until the very end of the budget. The end result is a noticeable "oh snap" moment among observers, including there at the speech and elsewhere, watching live. It also makes for prettier news coverage.
- This is known as a "doorknob moment", where the very act of leaving prompts one party in the about-to-be-terminated conversation to offer information that had not come up, though it is more often the person who is not walking out the door that offers up new information.