Yes, Michael Cyril Creighton has seen that viral fan theory about his Only Murders in the Building character - and he has the perfect response. Fans have wondered whether Creighton, 46 - who portrays Howard in the beloved Hulu show - could be the series' overarching antagonist behind certain unexplainable incidents (think: who poisoned Oliver's dog?). But in Creighton's mind, the plot twist would have a major hole in it.