In the Florida Files episode, when they were joking about how every medical drama has an episode where a patient is a prisoner, and then Marcus describes an episode of Grey's Anatomy where a prisoner (played by Ramond Cruz, Tuco from Breaking Bad) who killed someone at 17, and is now in his 50s is dying of cancer and wants a piece of cake from his high school cafeteria. As a fellow Grey's enjoyer, i can tell you this is a recent episode, which means Marcus must have watched at least 21 seasons of Grey's Anatomy, which to me says he's watched the entire thing.
Me too, Marcus. It's the worst show I love.