Darkstar (1974)
John Carpenters directorial debut, it started as a student short then was later re-shot into a longer film and eventually received additional funding for a theatrical release. His co-writer Dan O'Bannon later wrote or was involved with many of my favourite sci-fi's. It follows the story of a long range scout ship looking deep in space for potential threats to human space colonization.
Its really impressive, been on my watch list for a couple of years - it was recommended because of having plot points around AI. I won't say more about the plot as there are some nice surprises if not twists. As for quality, its a 50 year old sci-fi originally made for less than $20,000, the sets and effects are incredibly impressive for what they are and theres a great amount of detail in the dialogue that really builds on what they can't show you.
8/10