They say high school is the best time of a young person’s life, and when looking back over the famous high school classes of television’s past, it’s a hard to disagree. So flip back through television’s high school yearbook with Snakkle as we explore our favorite graduation episodes of all of TV time.

Time out! It’s Mark-Paul Gosselaar’s birthday, and Snakkle is looking back at his life and career, from the days of bleach-blond surfer attitude to Armani suits in the courtroom. Can you believe Zack Morris is all grown up? He still looks as hot as ever, though!

Denise Richards is about to turn 44. (It’s okay. We were surprised too.) Although she became a tabloid staple for a while—thanks to her relationships with Charlie Sheen and Richie Sambora—Ms. Richards has been acting since the early ’90s, with roles that varied from an uncredited appearance on The Ben Stiller Show to a brief but very memorable stint on Seinfeld. Herein, we present to you a list of memorable Denise Richards guest spots that you never knew existed—until now. And by the way—happy birthday, Denise!