You can judge how great a past SNL cast member was by the void they refill when they return to the show. Maya Rudolph's hosting gig in 2012 reminded viewers not only how irreplaceable of a triple-threat talent Rudolph is, but how colorless (in every possible meaning of the word) the cast seemed in her absence. Andy Samberg's return last May revealed the cast remained short of a goofball viewers seemed to like, even if the show could still produce amazing video content without him. If SNL needs to know what it's missing, it needs only bring back an old cast member to highlight the weak spots.
Bill Hader returned [...]