Born: 19 January 1961 (64 years old) Gender: Male
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Peter Mackenzie is an American actor best known for his starring role as Genius, who represents the title character's intellect and logic and often clashes with the Angel's naïvete and Animal's stupidity, in the television sitcom Herman's Head, from 1991-1994.
Show
Character
2 Broke Girls - Season 4
Devon
Ally McBeal - Season 4
Kendall Stevens
American Dad! - Season 1
Various
American Dad! - Season 3
American Dad! - Season 4
American Dad! - Season 5
Aquarius - Season 2
Sean Boyle
Better with You - Season 1
Neil
Big Love - Season 5
Bishop
Black-ish - Season 1
Mr. Stevens
Black-ish - Season 2
Black-ish - Season 3
Black-ish - Season 4
Black-ish - Season 5
Bones - Season 9
Congressman Efran Hadley
Boston Legal - Season 3
Reid Harrington
Castle - Season 6
Sgt. Roman
Close to Home - Season 2
Daryl Denham
Cold Case - Season 4
Harvey James
Criminal Minds - Season 1
Jack Fisher
Crossing Jordan - Season 6
Frank Ripton
CSI: Crime Scene Investigation - Season 2
Doctor
CSI: Crime Scene Investigation - Season 9
Dr. Eisling
CSI: Miami - Season 5
Russell Tanninger
Curb Your Enthusiasm - Season 7
Man in Shorts
Don't Trust the B---- in Apartment 23 - Season 1
Donald Colburn
Don't Trust the B---- in Apartment 23 - Season 2
Eli Stone - Season 2
Dr. Stephen Goodman
ER - Season 9
Mr. Pasbalas
Franklin & Bash - Season 4
Marcel Ziff
Friends with Better Lives - Season 1
Jim
George Lopez - Season 6
Dr. Loftusi
Gilmore Girls - Season 6
Dr. Schultz
Grey's Anatomy - Season 5
Warren Kramer
Growing Up Fisher - Season 1
Guest Star
Harry's Law - Season 1
Attorney Neville Johnson
Harry's Law - Season 2
Hart of Dixie - Season 1
Reverend Peter Mayfair
Hart of Dixie - Season 2
Hart of Dixie - Season 3
Hart of Dixie - Season 4
House of Lies - Season 1
Brant Butterfield
How I Met Your Mother - Season 6
Mr. Horvath
It's Always Sunny in Philadelphia - Season 9
Judging Amy - Season 2
Howlett
Law & Order: LA - Season 1
Attorney Simms
Mad Men - Season 6
Cliff Perry
Malcolm in the Middle - Season 1
Terry
Masters of Sex - Season 3
Leslie Farber
Murder in the First - Season 2
Public Defender Sherman Brown
My Name is Earl - Season 4
Daniel
NCIS - Season 9
Jack Murdoch
Off Centre - Season 1
Jay
One on One - Season 3
Blaine Lockraven
Raising Hope - Season 4
Mr. Gunderson
State of Georgia - Season 1
Paul Leary
Strong Medicine - Season 1
Asher
Supergirl - Season 1
Dirk Armstrong
The Bernie Mac Show - Season 3
The Drew Carey Show - Season 3
Mr. Firestein
The Drew Carey Show - Season 9
Arbitrator
The Fixer (2012) - Season 2
Brad Loeb
The Mentalist - Season 1
Holman Perry
The Parkers - Season 1
Coach Patrick Melville
The Practice - Season 7
D.A. Brenner
The Secret Life of the American Teenager - Season 5
Financial Aid Advisor
The Tick (Live Action) - Season 1
Male Nurse
The West Wing - Season 7
George Rohr
Will & Grace - Season 4
Mean Guy
Yes, Dear - Season 1
Reverend Green
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Soapie Digest: September 2025
Put a giggle in your shoes by hotfooting through this field of all the teasers on TVSA.
Kelders van Geheime 2 Teasers - September 2025
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New on TV today: Monday 1 September 2025
Rock musical drama The Runarounds debuts on Prime Video as Discovery finds Treasure Hunters Down Under.
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