The F.B.I. is an American police television series created by Quinn Martin and Philip Saltzman for ABC and co-produced with Warner Bros. Television. The series was broadcast on ABC from 1965 until its end in 1974. Starring Efrem Zimbalist Jr., Philip Abbott and William Reynolds, the series, consisting of nine seasons and 241 episodes, chronicles a group of FBI agents trying to defend the US government from unidentified threats. For the entirety of its run, it was broadcast on Sunday nights.