Question: While Tom Selleck is known for starring as private investigator Thomas Magnum in the television series "Magnum, P.I.", what role did Larry Manetti, play on "Magnum, P.I."?
Sentence (from "Tom Selleck"): He is known for starring as private investigator Thomas Magnum in the television series "Magnum, P.I." (1980–1988).
Relevant evidence: Yes