Peter Outerbridge (born June 30, 1966) is a Canadian actor, best known for his roles as Ari Tasarov in the CW action series Nikita, Dr. David Sandström in the TMN series ReGenesis, Henrik "Hank" Johanssen in Orphan Black, Bob Corbett in Bomb Girls, William Easton in the film Saw VI and George Brown in the television film John A.: Birth of a Country. He also played the lead role of Detective William Murdoch in a three-episode mini-series, The Murdoch Mysteries, in its initial run on Canadian television, with two episodes shown in 2004 and a third in 2005.

He appeared in three episodes of the revival series from 1995 to 2001:

• "The New Breed" - Dr. Andy Groenig
• "What Will the Neighbors Think?" - Ned Bailey
• "Replica" - Zack Griffiths and his clone

Garwin Sanford also appeared in the latter two episodes.

Archive footage of his appearance in "The New Breed" was later used in the clip shows "The Voice of Reason" and "Final Appeal". Similarly, footage of his appearance in "Replica" was used in "The Human Factor (2002)".