It might be always sunny in Philadelphia, but that doesn't mean there aren't some clouds about to hit Abbott Elementary ...

And so far, fans are pleased. A.P. Bio stars Glenn Howerton as Jack Griffin, a disgraced former Harvard professor who finds his job usurped by his literary and professional nemesis, Miles Leonard.

Watch Glenn Howerton and Jay Baruchel butt heads in trailer for tech comedy-drama BlackBerry Glenn Howerton goes bald in first look at drama about the rise and fall of BlackBerry ...