Crime Traveller(1997)

Crime Traveller is a British science fiction series that pairs detective Jeff Slade with scientist Holly Turner to solve crimes using her father's experimental time machine. The device allows them to travel back several hours to witness crimes as they unfold, but with a twist: the opening scenes of each episode are already shaped by their future actions. Working to prevent paradoxes while investigating, Slade and Turner navigate a complex web of cause and effect where their interventions have already altered events before they arrive. This unconventional approach to time travel keeps the narrative perpetually tangled, offering a fresh take on the genre where the mystery isn't just who committed the crime, but how their meddling in the past has already changed the present.