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Patrick Thomas O'Brien

Patrick Thomas O'Brien

Acting

January 26, 1951

75 years old

Wisconsin, USA

69 Credits

Known For

CSI: Crime Scene Investigation

CSI: Crime Scene Investigation

2000

Malcolm in the Middle

Malcolm in the Middle

2000

Monk

Monk

2002

Gilmore Girls

Gilmore Girls

2000

ER

1994

The West Wing

The West Wing

1999

Married... with Children

Married... with Children

1987

Married... with Children

Married... with Children

1987

It's Always Sunny in Philadelphia

It's Always Sunny in Philadelphia

2005

Baywatch

Baywatch

1989

Sabrina, the Teenage Witch

Sabrina, the Teenage Witch

1996

Sabrina, the Teenage Witch

Sabrina, the Teenage Witch

1996

Sliders

Sliders

1995

Babylon 5

Babylon 5

1994

Home Improvement

Home Improvement

1991

Family Matters

Family Matters

1989

The Wonder Years

The Wonder Years

1988

Night Court

Night Court

1984

Step by Step

Step by Step

1991

Felicity

Felicity

1998

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