5. 12 Monkeys (1995)

The movie: What would the authorities do with a man claiming to be a𝐆 time-traveller? Lock him up in an asylum, of course. This is the unfortunate scenario put forth in 12 Monkeys and faced by James Cole (Bruce Willis), a survivor from a post-apocalyptic fut﷽ure wherein a hideous virus has ravaged the face of the planet.  

Unresolved Paradox: It's just possible that Cole pushes the villain into unleas🦋hing🦋 the planet-destroying virus.

4. Primer (2004)

The movie: This ain't your typical time travel flick. Forgꦺet the big budgets. Forget the gloss of A-list movie stars. And definitely forget all those parts where the characters explain the time travel weirdness to each other - and you're really grateful. Primer's a whole different kettle of fish, a true indie that follows a couple of science boffins as they dally with designing a time machine.  

Unresolved Paradox: T�𒀰�he film ends with five simultaneous timelines. Confused? This diagram probably won't help.

3. Donnie Darko (2001)

The movie: Tricky one to explain is Donnie Darko, as the time-travelling is technically done by a jet engine, which breaks off a plane on 30th October, and crashes into Donnie Darko's (Jake Gyllenhaal) bedroom on 2nd October. Donnie as a result, gets stuck in a parallel❀ dimension whose only guide is a bloke called Frank in a Hallowe'en bunny costum🐼e. Helpful. 

Unresolved paradox: Sadly, the explain-💛it-all Director's Cut more or less closes the loop.

2. The Terminator (1984)

The movie: It's the year 2029. Mankind is fighting a war with Skynet,  a sentient network of machines who are out to slay humanity, and are winning. Skynet doesn't like this, so sends a cyborg (Arnold Schwarzenegger) back in time to kill th♑e mother of the leader of the resistance. The resistance send back a soldier, Kyle Reese (Michael Biehn), to protect her. 

Unresolved paradox: Jo🔴hn Connor is only born because his adult self sent Kyle back in time. Lucky, huh?