Leonard Nimoy, David McCallum, Cliff Robertson, Barbara Rush and Peter Breck are the only actors to appear in both this series and The Outer Limits (1963).
Several episodes contain plot threads that link them together. For example, the "Innobotics arc", the story of life-like androids created by the Innobotics Corporation, runs through these episodes: "Valerie 23", "Mary 25", "The Hunt", "In Our Own Image", and "Resurrection".
Sam Egan, the writer of the award-winning 100th episode Tribunal (1999), based the story of the episode on his father's experience in Auschwitz during World War II, where his first wife and their young daughter were murdered by the Nazis.
The Sci-Fi Channel (now Syfy) took over co-production for the seventh and final season in 2001 after the series was cancelled by Showtime.
The series, which ran for seven seasons, lasted considerably longer than the original version of The Outer Limits (1963), which only ran for two seasons.