8 Amazing Movies That Only Feature One Actor

Efficiency is the name of the game in Douglas Trumbull's decidedly non-epic, post-apocalyptic sci-fi film. Bruce Dern stars as an interplanetary greenhouse keeper in charge of growing and nurturing the plant life that's no longer able to inhabit a completely sterile Earth. And he loves it, because he loves the plants as if they were his children. It's equal parts cute and creepy, really.

When tasked with destroying all of the greenhouses he's spent so long maintaining, the ecologically-minded Dern instead decides to destroy all of the other humans aboard the space freighter. The way in which all of this transpires in the first act is almost freakishly rote. Dern is passionate about watering his plants, but he's pretty casual when it comes to blowing up people.

These people, by the way, show up for only a moment in what could almost be described as throwaway scenes. Because it's clear Trumbull can't wait to get beyond the whole murder thing and focus on Dern's isolation, expanding on his relationship with his plants - and, because this is a sci-fi flick from the 70s, his robot helpers - with an unsettling voyeurism that almost makes you feel dirty for watching it.

If the idea of a crazy man going even crazier in space after he realises that gardening robots aren't any good at playing poker, then this is the movie for you.