- Rita and Dexter both have individual moments with the same purpose in Season 1: Both of them attack Paul, Rita in self-defense and Dexter so that he can frame him to protect Rita.
- Rita forcing her abusive ex-husband to sign the divorce papers in exchange for supervised visits with the kids, reminding him that she has the power to make him never be able to see his kids again.
- In "Born Free," the last episode of the first season: the Ice Truck Killer having been revealed as Dexter's long-lost brother, creeps into Dexter's apartment with the intent of killing Dexter's foster sister. As he pulls back the covers to discover he's just stabbed a mannequin, Dexter looms up behind him and loops a garrote around his throat.
- One of the earlier episodes of season two. Dexter after a car salesman that deals with his misogyny through murder, and Dexter wants advice on telling lies. The salesman gets into a rant about women, and calls Rita (Dexter's girlfriend) the c-word.
Dexter: DON'T...talk that way about my girlfriend. (stabs the hell out of the salesman)
- Dexter in Season 2 when Doakes confronts him about having something to hide,and Dexter states that he'll always be one step ahead of Doakes. When Doakes questions this, Dexter gets into his face and says "I own you" and headbutts him in the face, leaving his office to let Doakes chase him down and make a scene in the middle of the station. Watch it here.
- Lundy realizing a letter from the serial killer has been fabricated to provide all sorts of false leads, and quickly deducing the perpetrator is so savvy that he has to be one of their own: "Law enforcement"
- Rita finally telling her mother to shut up and tells her to get out and only show up for holidays and birthdays after her mother has constantly criticized Rita over so many things.
- Dexter overpowering Doakes while handcuffed, in the water, with a wounded leg
- In the season finale, Lila kidnaps Astor and Cody so once Dexter shows up to take them home she can kill them and Dexter by burning the place down. Through some quick thinking he gets Astor and Cody out after breaking the window which he can't escape through because it's too small for him, so he tries to break the chain on the door and fails, as he lies on the ground he has a flashback to the trip with Harry he had about his urge to kill as a child. Dexter then notices part of the wall that's burnt so much it's just the inner wall and he grabs a blanket and repeatedly slams against it with all of his strength and at the third attempt (By this time, the blanket's caught on fire and Dexter is feeling pain from the heat and from his slamming against the wall), he manages to slam through and thankfully Debra arrives just in time to put the fire on him out.
- In the Season 3 finale, Dexter breaking his own hand to escape from the man about to torture him then killing said man and throwing him in front of a police car. It's made even more awesome by the fact that Dexter pulls a successful Hannibal Lecture on the Skinner that makes him lose the control that he wanted a few seconds before the awesome events mentioned above.
- Season 3 Big Bad Miguel Prado gets one when he's not even present: Dexter discovers the supposedly incriminating blood-soaked shirt Miguel gave him as a sign of trust only contains cow blood, indicating that everything that's happened so far has been an Evil Plan by him.
- He has another one a few episodes earlier, where he orchestrates the death of an Aryan Brotherhood gang leader and monster that Dexter had been unable to get at for years.
- "Science is one cold-hearted bitch with a 14-inch strapon." Masuka's moment of awesome while shooting down someone trying to sneak something past him in a report.
- Deb's pushing Dexter into accepting his responsibility in being a father for his unborn child and telling him flat out to put his worries behind because he's going to be a fantastic father.
- Dexter in Season 4 when Arthur almost strangles his own son in front of Dexter and Dexter uses his belt to choke Arthur, drags him to the kitchen, throws him to the floor, and, grabbing a knife, jumps on top of him saying "I should have fucking killed you when I had the chance."
- Also Jonah himself: what causes his father to try to kill him is his finally Calling the Old Man Out, culminating in his destroying Arthur's treasured urn of his sister's ashes.
- Also from season 4, Dexter rescuing Scott Smith from a cement grave just in the nick of time, after whacking Trinity with his own shovel.
- After Trinity kidnaps and holds captive a young boy from the mall, the boy stands up to him, despite Trinity being a mass murderer.
- Kyle Butler and his cover get blown on his own workplace by Trinity, who casually drops an ominous line.
Trinity: Hello... Dexter Morgan.
- In the season five premiere, Dexter knowingly takes an innocent life for the first time. Yet we still cheer him on since the guy was still a gigantic Jerkass who'd just viciously insulted Rita.
- The thing about this kill was that it was entirely motivated by human emotion, Dexter's incredible grief and pain at losing Rita. So in twisted way, despite committing a brutal murder, it was Dexter being more human than he'd ever been.
- In "Teenage Wasteland", Debra's What the Hell, Hero? to LaGuerta, getting her to reopen the Barrel Girls case.
Debra: There are five dead girls in barrels. And now there's DNA evidence saying that some of the people responsible are still out there. And you think that's about me trying to get back at you? Did you even read the file? There's fucking proof!LaGuerta: Just watch your tone.Debra: You know, you throwing me under the bus for the Fuentes brothers, using your husband as a chess piece, putting Quinn on bogus vacation days so I don't have a fucking partner? If that's all just some game to you, I'll try to understand it. But those girls are dead. Don't you want to make sure that that doesn't happen again? I mean, what the fuck are we doing here?
Dexter: You know, I'm glad you didn't touch them.Chase: Really? Why's that?Dexter: Because, this will clear you of being suspected, and leave you to me. And to her. Tick tick tick, your time's up.
- Deb shooting Carlos Fuentes when he takes a hostage, after her previous hesitation with him almost got a hostage killed.
- Dexter in season 5 killing Liddy, shortly after being tazered and starting with his hands tied behind his back.
- In the last episode of season 5 Dexter stabbing Chase in the foot pinning him to the ground and everything that follows shortly.
- What truly makes it is Chase's Oh Crap! beforehand as he realizes one of the knives is missing.
- Dexter beating the crap out of Olivia's step dad for hitting her in secret. Even Harry thought it was awesome.
By the way, that's your kidney.
- Made so much more awesome by how calm he remains throughout
- Deb taking down a man shooting up a restaurant, shooting his legs when she realizes he has a bulletproof vest.
- Angel and Quinn finding the Doomsday Killer's identity while stoned off their asses, completely showing up that same new detective from above.
- Dexter killing Nick on the spot with far more passion than usual, after he shows no remorse for killing Brother Sam.
- Dexter banishing Brian from his subconscious, after realizing he truly does have a conscience now, doing so by running over his ghost. It's just made perfect when he then picks up a hitch-hiking Harry.
- In "Talk to the Hand", Dexter saves the police department from a poison gas attack, even risking his own life so everyone can get out in time.
- In the season 6 finale, Dexter saves Harrison by fake-injecting himself with his tranquilizer, then gives the bastard lovechild of a "World of Cardboard" Speech and a "The Reason You Suck" Speech to Travis before killing him.
- Deb verbally owning the sexist new detective she hired, after he refuses to believe she's his boss.
- Dexter turning the tables on the slimy and devious Louis, making him lose his job and then his girlfriend with two surgical non-violent strikes. A bit undermined by Louis' death not long after that
- Dexter's recreation of Isaak "the Terminator" vs the Colombian dealers, in which Isaak shows Ray Stevenson's usual badassery while outnumbered.
- In the series finale, Dexter calmly walks into Oliver Saxon's holding cell ostensibly to perform a GSR test until he declares, "I'm here to kill you with that pen." And so he does.