The 1960s version of the pilot, according to Patrick White in The Complete Mission: Impossible Dossier (which White reports was actually the second such pilot, but Graves was not involved in the first), is credited with winning Graves the role of Phelps; after Mission: Impossible ended in 1973, Graves filmed a third version of the pilot (this one structured as a made-for-TV movie), but it did not sell as a series. The concept was later used in the brief 1980s adventure series Masquerade.