From 1994 to 1999, Critchlow starred on the American daytime soap opera Days of Our Lives as Dr. Mike Horton.^[2] On June 23, 2010, Roark returned briefly to Days of Our Lives in the role of Dr. Mike Horton.^{[citation needed]} He reprised the role once again on October 4, 2022.^{[citation needed]} He also had a recurring role on the soap Passions in 2003.

Critchlow was in the television film The Perfect Husband: The Laci Peterson Story^[3], the Lifetime made-for-TV movie Pregnant at 17^[4] as well as appearing in the Nickelodeon series Drake & Josh as Dr. Glazer.^[5] He also portrayed Zoey Brooks' father in Zoey 101. Roark has had smaller roles in movies like Mr. Deeds with Adam Sandler^[6] and TV shows such as Street Justice,^[7] Malcolm in the Middle, Entourage, Highlander: The Series, Afterworld and Friends. In 2009, he appeared in an episode of the re-imagined Battlestar Galactica. He also appeared in the 2009 movie Hydra as Sean Trotta. Critchlow recently had a recurring role on the science fiction TV show V and on the ABC Family drama television series Pretty Little Liars, where he played Tom Marin, the father of Hanna Marin.^[8] He was guest starred on Charmed, in which he played a man with the sin of greed.^{[citation needed]}

Critchlow was born in Calgary, Alberta, Canada and grew up in Summerland, British Columbia.^[9] He was a theater major at the University of Victoria, and married Maria Brewer in 1990, with whom he produced and co-starred in Making it Home.^{[citation needed]} They have three children. They divorced in 2006.^{[citation needed]} Critchlow enjoys many sports and was named after Howard Roark, a character in the book The Fountainhead.^{[citation needed]}

• Roark Critchlow at IMDb