 He made three guest appearances on "Perry Mason", and on two appearances, "The Case of the Jaded Joker" in 1959 and "The Case of the Missing Melody" in 1961, he showed his musical talents.In 1969 and 1970, he appeared as "Bobby" in two episodes of "Mannix", where he was a lounge piano player who helped Mannix unravel cases.. Troup tried his luck at bowling on Celebrity Bowling.