Erik Knudsen is a Canadian actor. He is known for portraying Daniel Matthews in Saw II, Robbie Mercer in Scream 4, Alec Sadler in Continuum and Dale Turner in the CBS series Jericho.

Saw II is a 2005 horror film directed by Darren Lynn Bousman and written by Leigh Whannell and Bousman. It is the sequel to 2004's Saw and the second installment in the Saw film series. The film stars Donnie Wahlberg, Franky G, Glenn Plummer, Beverley Mitchell, Dina Meyer, Emmanuelle Vaugier, Erik Knudsen, Shawnee Smith, and Tobin Bell. In the film, a group of ex-convicts are trapped by the Jigsaw Killer inside a house and must pass a series of deadly tests to retrieve the antidote for a nerve agent that will kill them in two hours.