A double feature was a term referring to two movies being shown one after the other.
In 2377, as members of the crew of USS Voyager were about to watch a movie on a recreation of a 20th century movie theater on the ship's holodeck, Tuvok enquired about the duration of the film. Kathryn Janeway then told him she'd heard Tom Paris mention something about a double feature. (VOY: "Repression")