Acclaimed time-travelling crime drama about a modern-day detective who wakes up in 1973 after a near-fatal car crash. Smart, savvy, sharp-suited detective Sam Tyler has his world turned upside down when his pursuit of a murderer leads to a serious car accident. When he comes round, he finds himself in 1973 - just four years after he was born. Confused by his new and outdated surroundings, Sam tries to return to the present. But the police force of long ago needs his help, not least in solving a parallel crime. Has Sam gone crazy? Is he in a coma? Or has he really travelled back in time?