Beginning his film and television career in 1994, Blanche appeared in over seventy film and television projects. Among other works, he recurred in a guest-starring role as Lt. Bonanno (and later Det. Capt. Bonanno) on three seasons of the TNT series Leverage. He recurred in the role of Sgt. Franco on NBC's Grimm.
- 1999 Switched at Birth as Dr. Nurenberg
- 2006 Raising Flagg as Matt Durwood
- 2011 Zombie Apocalypse as Brockton
- 2014 Bermuda Tentacles as Captain Dave Williams
- 2014 Bullet as Travis
- 2014 Something Wicked as John
- 2017 Tomorrow, Maybe as Lloyd
- "We Mourn the Passing of Robert Blanche". SAG-AFTRA. Retrieved January 10, 2020.
- Hamman, Cody. "Go behind the scenes of the Brain That Wouldn't Die he was the best remake". Retrieved 26 April 2017.
- Netzley, Sara (1 April 2017). "'Grimm' Series Finale Recap: Nick Calls on the Strength of His Blood to Destroy the Destroyer". EW.com. Retrieved 26 April 2017.
- Turnquist, Kristi. "What's it like to work on 'Grimm,' 'Portlandia' and 'The Librarians?' Portland TV pros explain". OregonLive.com. Retrieved 26 April 2017.