On the box: ‘The Outer Limits’ episode ‘Controlled Experiment’
(Embedding has been disabled.) Oxbridgean Martian anthropologists study early-1960s Earth with a period-looking time-control machine. Carroll O’Connor as few perhaps remember him. A sort of ‘Prime Directive’/don’t-change-history lesson but things aren’t deterministic... like God in his eternal now knows the outcome of everything but it all happens freely.