Film night triples ideas

Blade Runner, Akira, V for Vendetta, Brazil, Metropolis (1927), Strange Days. Also see HackerFlicks.
Time travel
Primer, Slaughterhouse-Five, The Final Countdown.
Anything from The Flix Capacitor: Triangle, ARQ, La Jetée* (28 minutes), and Summer Time Machine Blues.
The (original) Thomas Crown Affair, Dog Day Afternoon, Reservoir Dogs, Inception.
Films about surveillance
The Conversation (FFC), The Lives of Others, Three Colours: Red.
2001: A Space Odyssey, A Clockwork Orange, The Shining.
Solaris, Stalker, Mirror.
Von Trier's Golden Heart Trilogy
Breaking the Waves (1996), The Idiots (1998), Dancer in the Dark (2000).
Acid Westerns
El Topo (1970).
Films from 'Science Fiction Double Feature'
This is basically old sci-fi B-movies. In order: The Day the Earth Stood Still (1951), Flash Gordon (1936), The Invisible Man (1933), King Kong (1933), It Came from Outer Space (1953), Doctor X (1932), Forbidden Planet (1956), Tarantula (1955), The Day of the Triffids (1962), Night of the Demon (1957), When Worlds Collide (1951).