John Karlen (born John Adam Karlewicz) was an American character actor who played multiple roles (Willie Loomis, Carl Collins, William H. Loomis, Desmond Collins, Alex Jenkins, and Kendrick Young) on the ABC serial Dark Shadows, in various episodes which aired from 1966 to 1971. Karlen also played Harvey Lacey, husband of Mary Beth Lacey (played by Tyne Daly), on the CBS crime series Cagney & Lacey (1982–88).
Lt. Martin McGinn
Patrick MacNair
Superintendent Arthur Joyce
Harris
Leo
Leonard Chaffey
Chuck
Harvey Lacey
Rev. Ezekiel L. Henshaw
Agent Brice
Willie Loomis
Pinky
Hicks
Gus Stemple
Leo
Johnny Alban
Ken Navaretti
Joe Farrell
Reverend Walker
Mickey
Jake West
Arthur Barwell
Johnny Wexford
DiSalvo
Self
Alex Jenkins
Capt. Harrison
Power plant worker
Uncle George
Jim Russell
Duane Haley
Jerry Barr
Manning
Mr. Nash
Albert
Willie Loomis
Ned
David Hastings
Sam Akers
Jack McAllister
The Detective
Coach Ritter
Chapel
Quinn
Stefan Chilton
John Garner
Richard Copell
Danny
Thomas Amman
Jake Morrison
Vincent Parker
Mac
'Tony' Anthony Redecci
Alan Campbell
Max
Lenny
Mike Burnette
Herbie Bush
Joe Silvano
Waldo Church
Harvey Lacey
Lieutenant Wingo
Bob Russell
Harvey Lacey
Charlie Powers
Geffin
Al
Sam Cowley
Kessler
Sgt. Madden
Harvey Lacey
Otto Roget
Bucky Berkshire
Joe Farrell
Harvey Lacey
Marty