Cast the Expert: All the crew aboard the research ship and its submarine are, well, actual research-ship-and-submarine crewmembers. Cameron hired the Akademic Mstislav Keldysh to visit the wreck, and kept them on payroll for use as set and extras once the production phase started.
The Danza: Lewis Abernathy, who is not an actor but a friend of James Cameron, plays Lewis Bodine.
Deleted Scenes: An hour's worth of deleted material can be found on the blu-ray.
Returning to her room after dinner, Rose freaks out and starts smashing everything before running to the stern.
Rose entering Third Class the day after her suicide attempt to find Jack.
After the party in Third Class, Jack and Rose sing "Come, Josephine" on their way back to First Class.
On Sunday morning, Thomas Andrews shows Cal, Ruth, and Rose the gymnasium as part of their tour of the ship. Cal fiddles with the rowing workout, while Ruth says "she doesn't believe she would ever need to use that." On their way out, Rose punches a large punching bag. After that, Tommy and Fabrizio help Jack sneak into First Class.
The wireless operators Phillips and Bride are backlogged in their work, only to hear the Californian messaging them warning about the ice field Titanic is about to steam into. They tell him to shut up.
Rose telling Jack Lovejoy's backstory and kissing Jack in the boiler room while running away from him.
The death of Assistant Engineer Jonathan Shepherd, the historical "first victim" of the Titanic (he broke his leg and asked to be left behind in a flooding room so others could survive).
After receiving the order to send out the distress call CQD, Bride suggests to Phillips that they use the new distress call SOS. "It might be [their] only chance to use it."
Astor showing his wife what's inside a life jacket by cutting it with a knife in the gym, and the gym manager saying that he doesn't need a jacket because it will limit his stroke.
Jack and Rose being given sheets and whiskey by a steerage couple.
Fabrizzio has his own romantic subplot with Helga, a Norwegian third-class immigrant. She refuses to leave her parents when Fabrizzio, Rose, Jack and Tommy go looking for another exit and perishes with her family.
Right after chasing Jack and Rose into the First Class Saloon, Cal offers the diamond to Lovejoy, who then calmly stalks them in the flooded room before Jack subdues him. This is the reason Lovejoy is bloodied when the ship breaks apart.
Ida Strauss refusing to board a boat without her husband (they are the old couple seen on a bed as water rushes in).
Captain Smith calling for Molly Brown's boat to come back and pick more survivors, only for Quartermaster Hichens to overrule it.
The first class dogs running free over the sinking ship's decks.
Phillips radioing for help while the water rushes in, until Bride puts a life jacket on him and forces him out.
Many scenes of the sinking in and around the Great Staircase.
Cora and her family trapped bellow decks and drowning.
A French bulldog swimming past Jack and Rose.
Jack talking another survivor from getting on Rose's wooden platform.
A Chinese passenger being pulled out of the water alive by the returning lifeboat.
Ismay receiving a "walk of shame" aboard the Carpathia.
Cal confusing another steerage woman with Rose aboard the Carpathia.
Old Rose stopping her tale and being pulled away to rest, and expanding on Cal's fate (his sons fought each other for his remaining assets "like hyenas").
This is a James Cameron film. So the final film's 3 hours long. There is an hour of deleted footage and another hour worth of script that was never filmed. Among it, an entirely unrelated subplot about Real Life early film pioneer Daniel Marvin, his wife Mary and his newbrand camera all aboard the Titanic.
Doing It for the Art: The film went over budget and over schedule, Cameron forfeited his salary to make sure he could continue. Not to mention the extensive amounts of research and detail the production team put into making the film.
Enforced Method Acting: The water during filming was deliberately cold, so Leo shouting "Oh shit, this is cold!" is real as well as Kate's gasp when she gets chest-deep in the water. The scene where Jack and Rose are swept away by a rush of water in the hallway is also real.
Fake Brit: Australian Jonathan Hyde as English White Star Line Chairman J. Bruce Ismay.
The actor playing Sixth Officer Moddy, Edward Fletcher, is American.
James Cameron himself cameos in the movie, during the sinking scene. He is among the crowd surrounding Father Byles as he gives the Last Rites. He also shows up at the steerage party and getting checked for lice at Southampton.
James Cameron's hands are also shown as a stand in for Jack's during the drawing scene.
Meaningful Release Date: The 3D rerelease was timed to correspond to the centenary of the sinking in 2012. It released on April 6th, four days before the Titanic set sail - most likely to avoid a midweek release, and to capitalise on Easter weekend crowds.
Jack telling Rose to lie "Over on the bed— uh, the couch." was an accidental flub, but James Cameron thought that was natural, so he left it in. You can see DiCaprio almost swearing to himself, thinking he's ruined the take, but it comes off as a nervous 20-year-old thinking how much he just embarrassed himself in front of the girl he loves.
Troubled Production: Over budget, behind schedule, anyone that could get injured and/or sick did so (Kate Winslet even said she only works with James Cameron again for a lot of money!), a disgruntled crew member drugged the night soup...
Like Avatar, this was written as a 4 hour-long movie but wound up being cut down to 3 hours.
Cameron originally wanted Drew Barrymore to play Rose, but execs told him that she wouldn't be right for the role.
Johnny Depp also admitted in an interview that he was offered the lead role in the movie but turned it down, and considers it a big regret.
Cameron offered the role of Old Rose to Fay Wray, who turned it down thinking it would have been "a tortuous experience altogether."
The role of Molly Brown was originally going to go to Reba McEntire, who had to drop out due to her tour schedule.
There were manny different scripted deaths for Fabrizio. One had him swimming to Cal's lifeboat and asking to be let in, saying that it was his destiny to go to America. Cal would then knock him with an oar and sarcastically yell "It's that way!"