Season 1 Prime Suspect 1 ITV1 , 1991 Watch now Season 2 Prime Suspect 2 ITV1 , 1992 Watch now Season 3 Prime Suspect 3 ITV1 , 1993 Watch now Season 4 Prime Suspect 4 ITV1 , 1995 Watch now Season 5 Prime Suspect 5: Errors of Judgement ITV1 , 1996 Watch now Season 6 Prime Suspect 6: The Last Witness ITV1 , 2003 Watch now Season 7 Prime Suspect 7: The Final Act ITV1 , 2006 Watch now