| Series
|
Role
|
Episode
|
Airdate
|
| General Electric Theater |
Leprechaun |
4x35 - O'Hoolihan and the Leprechaun |
June 3, 1956
|
| The Twilight Zone |
Sam Conrad |
1x25 - People Are Alike All Over |
March 25, 1960
|
| Naked City |
Donnie Benton |
2x20 - The Fault in Our Stars |
March 22, 1961
|
| Ben Casey |
Dwight Franklin |
4x19 - When I Am Grown to Man's Estate |
February 8, 1965
|
| 12 O'Clock High |
Technical Sergeant Willets |
2x24 - Angel Babe |
February 28, 1966
|
| Run for Your Life |
Gyula Bognar |
1x25 - Don't Count on Tomorrow |
March 28, 1966
|
| Batman |
The Bookworm |
1x29 - The Bookworm Turns (1) |
April 20, 1966
|
| Batman |
The Bookworm |
1x30 - While Gotham City Burns (2) |
April 21, 1966
|
| The Felony Squad |
Ollie Olds |
2x18 - The Flip Side of Fear (1) |
January 15, 1968
|
| The Felony Squad |
Ollie Olds |
2x19 - The Flip Side of Fear (2) |
January 22, 1968
|
| Medical Center |
Carl Marris |
2x13 - Crisis |
December 9, 1970
|
| Ironside |
Jamie Shannon |
5x07 - Murder Impromptu |
November 2, 1971
|
| Columbo |
Roger Stanford |
1x06 - Short Fuse |
January 19, 1972
|
| Mission: Impossible |
Leo Ostro |
7x13 - The Puppet |
December 22, 1972
|
| Barnaby Jones |
Stanley Lambert |
1x09 - See Some Evil...Do Some Evil |
April 8, 1973
|
| McMillan & Wife |
Jamie McMillan |
3x01 - Death of a Monster...Birth of a Legend |
September 30, 1973
|
| Police Woman |
|
2x01 - Pawns of Power |
September 12, 1975
|
| Harry O |
|
2x21 - The Mysterious Case of Lester and Dr. Fong |
March 18, 1976
|
| The Love Boat |
Fred Beery |
2x17 - Second Chance / Don't Push Me / Like Father, Like Son |
January 27, 1979
|
| Supertrain |
Talcott |
1x08 - The Green Girl |
April 28, 1979
|
| Hart to Hart |
Dr Peterson |
pilot - Hart to Hart |
August 25, 1979
|
| Trapper John, M.D. |
Rev. Barnaby Box |
1x01 - Trapper John, M.D. |
September 23, 1979
|
Buck Rogers in the 25th Century (credited as Roddy McDowell) |
Governor Saroyan |
1x03/04 - Planet of the Slave Girls |
September 27, 1979
|
| Hotel |
Anthony Spears |
2x01 - Intimate Strangers |
September 26, 1984
|
| Murder, She Wrote |
Alger Kenyon |
2x04 - School for Scandal |
October 20, 1985
|
| Matlock |
Christopher Hoyt |
1x12 - The Chef |
January 6, 1987
|
| Murder, She Wrote |
Gordon Fairchild |
5x13 - Fire Burn, Cauldron Bubble |
February 19, 1989
|
| Matlock |
Don Mosher |
3x12 - The Starlet |
February 28, 1989
|
| Quantum Leap |
Edward St. John V |
4x22 - A Leap for Lisa |
May 20, 1992
|
| Batman: The Animated Series |
The Hatter |
1x24 - Mad as a Hatter |
October 12, 1992
|
| Batman: The Animated Series |
Mad Hatter |
1x26 - Perchance to Dream |
October 19, 1992
|
| Batman: The Animated Series |
Mad Hatter |
1x64 - The Worry Men |
September 16, 1993
|
| Batman: The Animated Series |
Mad Hatter |
2x04 - Trial |
May 16, 1994
|
| Duckman |
Akers |
3x07 - Apocalypse Not |
February 24, 1996
|
| The New Batman Adventures |
Mad Hatter |
1x11 - Over the Edge |
May 23, 1998
|
| The New Batman Adventures |
Mad Hatter |
2x04 - Animal Act |
May 23, 1998
|
| Superman: The Animated Series |
Mad Hatter |
3x02 - Knight Time |
October 10, 1998
|