Life on Mars

Episode 1 (1x1)

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DCI Sam Tyler, in pursuit of a serial killer, is knocked unconscious by a car and wakes up in 1973, where he is a newly-transferred detective inspector working at the same station. Initially refusing to accept his situation, he finds it difficult to adjust to the attitudes and technology of the day. Investigating a murder in 1973, he recognizes a possible connection to events in the present day.