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 "Monte Walsh (2003 film)"): Monte Walsh is a 2003 Western television film directed by Simon Wincer and starring Tom Selleck, Isabella Rosellini, and Keith Carradine.
Relevant evidence: No