 _"Magnum, P.I." (1980)_ (qv) began production soon after this series  wrapped its last episode. In order to keep some sort of continuity,  reference to characters from this show were included in early  episodes of Magnum. However, a plan to have Jack Lord (I) (qv)  appear as McGarrett never came to pass. Lord retired from acting  after the series went off the air.