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The CW, Patrick Lewis/Starpix for The Paley Center For Media/Shutterstock
He wasn't a regular teacher, he was a cool teacher...at least for the three seasons Eggold played Ryan Matthews before the show transitioned to its college years. (Fun fact: He was actually younger than some of the actors who played his students.)
The 36-year-old would go on to in NBC's The Blacklist, with his character Tom Keen later getting his own shortlived spinoff, The Blacklist: Redemption.
Since 2018, Eggold has starred on NBC's hit medial drama New Amsterdam.