Circular Structure
Ending the film where it started, or with a scene that echoes the opening. The repeat shows what has changed, or suggests the cycle will keep going.
City of Women
The film begins on a train and ends back there. The return tells you the whole adventure may have been in Snaporaz's head.
Twelve Monkeys
Cole keeps dreaming of a man shot in an airport while a small boy watches. The ending returns to that airport and turns the dream into a memory. The loop tells you his path was fixed from the first scene.

