Mark-Paul Gosselaar stars as Sir on the NBC drama "Found."

Gosselaar appeared in the series "Will Trent" opposite Rámon Rodríguez and Erika Christensen.

Gosselaar made his television debut in the popular teen sitcom "Saved by the Bell." Since then, he has had an extensive and successful career co-starring in a number of series, including "NYPD Blue," "Raising the Bar," "Franklin & Bash," "The Passage," "Pitch," "Commander in Chief" and "Mixed-ish."