2005
Odd Job Jack
(TV Series)
General / Lieutenant / Drill Sargent Skitzkopf
2004-2005
Zeroman
(TV Series)
Zeroman
2001
Liography
(TV Series)
Terrence Brynne McKennie
1994-1999
Due South
(TV Series)
Sgt. Buck Frobisher
-
Manhunt
(1994)
... Sgt. Buck Frobisher
1996
Harvey
(TV Movie)
Dr. Chumley
1987
Nightstick
(TV Movie)
Thad Evans (as Leslie Nielson)
1985
227
(TV Series)
Mr. Gamble
1985
Hotel
(TV Series)
Jonathan Talbot
1982
Creepshow
Richard Vickers (segment "Something To Tide You Over")
1978-1980
Fantasy Island
(TV Series)
Emile Bouvier / Victor Conti / Doctor Whitfield
1980
OHMS
(TV Movie)
Governor
1979
Riel
(TV Movie)
Major Crozier
1977-1979
The Love Boat
(TV Series)
Hank Hardaway / Dan Michaels / Russ Blanchard
1979
Vega$
(TV Series)
Tyler Dickenson
1977
Lucan
(TV Series)
Sheriff Ramsey
1971-1975
Columbo
(TV Series)
A.J. Henderson / Peter Hamilton
1973-1975
Cannon
(TV Series)
Weller Dane / Erich Strasser / Joe Gilbert
1975
Kung Fu
(TV Series)
Vincent Corbino
1974
Kojak
(TV Series)
Michael Hagar
1973-1974
The Evil Touch
(TV Series)
Captain Andrew Palmer / Willie Tremaine
-
The Obituary
(1973)
... Willie Tremaine (as Leslie Nielson)
1965-1973
The F.B.I.
(TV Series)
Hudson / Craig Fletcher
1973
The Letters
(TV Movie)
Derek Childs (The Parkingtons Episode)
1973
M*A*S*H
(TV Series)
Col. Buzz Brighton
1971
Sarge
(TV Series)
Joe Drake
1971
Night Gallery
(TV Series)
Col. Dennis Malloy (segment "A Question of Fear") / The Phantom (segment "Phantom of What Opera?")
1964-1969
The Virginian
(TV Series)
Ben Stratton / Winthrop / Cleve Mason / ...
-
Ryker
(1964)
... John Hagen
1967
Bonanza
(TV Series)
Sheriff Paul Rowan
1965
Dr. Kildare
(TV Series)
Harry Kleber / Walter Burton
1965
Convoy
(TV Series)
Steiner
1963-1965
Ben Casey
(TV Series)
Dr. Jeff English / Dr. Walter Kulik
1965
Peyton Place
(TV Series)
Vincent Markham / Kenneth Markham
1964-1965
The Defenders
(TV Series)
Bob Garrison / Sergeant Jerry Hegan
-
Survival
(1964)
... Sergeant Jerry Hegan
1960-1964
Wagon Train
(TV Series)
Brian Conlin / Jeremy Dow
1963-1964
The Fugitive
(TV Series)
Harold Cheyney / Martin C. Rowland
1963
Channing
(TV Series)
Prof. Paul Stafford
1960-1962
Route 66
(TV Series)
Doc Duncan / Mark Christopher
1960
Thriller
(TV Series)
Alan Patterson
1959-1960
Startime
(TV Series)
Dr. Stockmann / John Proctor
1959
Rawhide
(TV Series)
Eli Becker
1958-1959
Playhouse 90
(TV Series)
Eddie Kirkley / Ralph Mohr
1958
Folio
(TV Series)
Biff Loman
1950-1954
Kraft Theatre
(TV Series)
Rev. Arthur Dimmesdale / Prince Charming
1952-1953
Omnibus
(TV Series)
(segment "The Capital of the World" 2) / (segment "Mother Goose")
1950-1953
The Web
(TV Series)
Dennis
1950-1953
Suspense
(TV Series)
Serge Soudekine / Ralph Farley
1950-1952
Lights Out
(TV Series)
John Robinson / Bill