| Television |
| Year | Title | Role | Notes |
| 1957 | Zane Grey Theater | Will Gorman | episode: "Gift from a Gunman" |
| 1957 | The Polly Bergen Show | Himself | episode: "December 7, 1957" |
| 1958 | Roberta | John Kent | Television film |
| 1961 | Tales of Wells Fargo | Justin Brox | episode: "Casket 7.3" |
| 1963 | Death Valley Days | Diamond Jim Brady | episode: "Diamond Jim Brady" |
| 1964 | Kiss Me, Kate | Fred Graham / Petruchio | BBC 2 |
| 1965 | Run for Your Life | Hardie Rankin | episode: "The Time of the Sharks" |
| 1967 | The Red Skelton Show | Police Officer McGoogle | episode: "A Christmas Urchin" |
| 1969 | Here's Lucy | Mr. Livingston | episode: "Lucy's Safari" |
| 1969 | Insight | Himself | episode: "Is the 11:59 Late This Year?" |
| 1975 | The Wheeltappers and Shunters Social Club | Himself | episode: "21, March 29 1975" |
| 1976 | The Quest | Shanghai Pierce | episode: "Seventy-Two Hours" |
| 1981 | The Love Boat | Duncan Harlow | episode: "Maid for Each Other/Lost and Found/Then There Were Two" |
| 1981–1991 | Dallas | Clayton Farlow | 234 episodes |
| 1982 | Fantasy Island | Colonel | episode: "The Big Bet/Nancy and the Thunderbirds" |
| 1983 | The Love Boat | Kyle Cummings | episode: "Long Time No See/The Bear Essence/Kisses and Makeup" |
| 1984 | Entertainment Express | Himself | episode: "Episode 2.2" |
| 1984 | Live from Her Majesty's | Himself | episode: "April 15, 1984" |
| 1985 | Doris Day’s Best Friends | Himself | episode: "Episode 1.14" |
| 1986 | Great Performances | Himself | episode: "Irving Berlin's America" |
| 1991 | Good Sports | Sonny Gordon | episode: "The Return of Nick" |
| 1991 | Murder, She Wrote | Larry Thorson | episode: "A Killing in Vegas" |
| 1993 | Bruce's Guest Night | himself "Guest" | BBC programme |
| 1994 | Hart to Hart: Home Is Where the Hart Is | Captain Quentin "Jack" Jackson | television film |
| 1995 | Walker, Texas Ranger | Dade | episode: "Blue Movies" |