Day 29 - Best pre 1980s sci-fi

Another film that I remember from those great days in the 1970s when all this fantastic science fiction turned up on TV. I was completely floored by the ecological message in Douglas Trumball's Silent Running and absolutely charmed by the three service robots. It was great to see Huey, Dewey and the remnant of Louie show up in the recent Where'e WALL-E? poster.

However, I haven't seen this film in years. I suspect it might be a little boring now but I shall have to get hold of a copy and let you know.