Continuity mistake: Right after the train is hijacked by Robert Shaw at 28th Street station, there are 2 additional hostages in the front car (for a total of 19) that disappear after the train is hijacked between 23rd Street and 28th Street.
The Taking of Pelham One Two Three (1974)
1 continuity mistake
Directed by: Joseph Sargent
Starring: Walter Matthau, Martin Balsam, Robert Shaw, Hector Elizondo
Revealing mistake: When Mr. Green pulls out of 28th Street, we see him disengage the "Dead Man's Feature" (by pressing down on the throttle with his hand). However, he does not actually move the control lever to make the train move. In that position, the train is at "idle" and will not accelerate.
Lt. Rico Patrone: Even great men have to pee.
Trivia: New York Transit Authority has code words for trains going through subways, based on the departure station and time of departure. Pelham One Two Three means the train left Pelham Bay Park Station at 1:23 pm. Ever since the 1974 film was released, New York Transit authority has made a conscious decision to try very hard not to let subway trains leave Pelham Bay Park Station at 1:23 in the morning or afternoon.