D is for Dark Star

The scout ship Dark Star and its crew of five have been alone in space for over twenty years... their mission, to destroy unstable planets using intelligent 'Thermostellar Triggering Devices'. However, with the captain now dead, the ship malfunctioning around them and mind-numbing tedium threatening to engulf the remaining four crew-members, forced to live together in such a confined space - what else can possibly happen...?

Set in the mid-22nd century, Dark Star is a low-budget black comedy from John Carpenter, released as a film in 1974. Fondly remembered.