Who Killed Who? (1943)

Billy Bletcher: Detective, Ghost

Quotes 

• Detective : [arriving right after the victim's murder]  Who done it? Everybody stay where you are!

  [someone in the movie audience gets up and starts walking away; the detective sees him and hits him with a baseball bat] 

  Detective : That goes for you too, bub!

• [in trying to find the killer, the detective pushes a button marked "RING FOR SUSPECTS"; the butler, maid, and chauffeur all appear] 

  Detective : Okay, which one of you mugs bumped off the old boy? Who done it?

  Butler , Maid , Chauffeur : Ohhhh, now, wouldn't YOU like to know!

• [last lines] 

  Detective : Now we will see who done it.

  [he unmasks the cloaked figure as it morphs to live action, revealing it to be the host from the intro] 

  Host : [sobbing hysterically]  I DOOD IT!