Acting
- 1972Banyon1 ep.
- 1967Moby Dick and Mighty Mightor54 ep.
- 1963Mr. NovakGus1 ep.
- 1963The Patty Duke Show1 ep.
- 1963The LieutenantPvt. Floyd James1 ep.
- 1961Westinghouse PlayhouseBuddy McGovern26 ep.
- 1961Mister Ed1 ep.
- 1960Pete and Gladys1 ep.
- 1959The RebelJody Webster1 ep.
- 1959The Many Loves of Dobie GillisDuncan Gillis1 ep.
- 1955FuryJoey Newton117 ep.
- 1954Father Knows Best1 ep.
Guest appearances
- 1972Banyon1 ep.
- 1967The FugitiveOllie1 ep.
- 1966The F.B.I.Soccer Player1 ep.
- 1966The Patty Duke Show1 ep.
- 1965Mister Ed1 ep.
- 1965The Andy Griffith ShowEvan Hendricks1 ep.
- 1964Mr. NovakGus1 ep.
- 1964The LieutenantPvt. Floyd James1 ep.
- 1963The Twilight ZonePrivate Pip1 ep.
- 1962The Many Loves of Dobie GillisDuncan Gillis7 ep.
- 1961Pete and Gladys1 ep.
- 1961The RebelJody Webster1 ep.
- 1957Letter to LorettaLowell1 ep.
- 1955Father Knows Best1 ep.
Also known as: Robert Diamond · Bob Diamond · Robert 'Bobby' Diamond · Robert L. Diamond