Bumping up our list of possible reasons to watch Showtime’s House Of Lies to a staggering “two” (right up underneath “Kristen Bell: still pretty charming”), It’s Always Sunny In Philadelphia’s Glenn Howerton will have a recurring role on the fifth season of the long-running show. Jumping from mean-spirited comedy to mean-spirited dramedy, Howerton will be lending his dead-eyed charisma to the role of Seth Buckley, a mayoral candidate who seeks advice from Ben Schwartz’s slimy spin doctor Clyde. (Audiences will presumably be asked to suspend their disbelief at the idea that the inventor of the D.E.N.N.I.S. System might need advice in profitable deception from Jean-Ralphio, of all people.)