Star Trek III: The Search for Spock (1984)
Star Trek III: The Search for Spock is the Star Trek film that exists primarily to undo the consequences of the previous Star Trek film. Christopher Lloyd plays the Klingon commander Kruge.
James Doohan landed at Juno Beach on D-Day with the Royal Canadian Artillery, was shot six times by friendly fire that night, and lost the middle finger of his right hand, which he concealed for decades on screen.
He invented Scotty’s accent himself during the audition, having tried several nationalities and concluded that engineers sounded Scottish.
The character generated a genuine surge in engineering enrolment, and Doohan received substantial correspondence about it. He appeared in seven films and hundreds of conventions.