During the play the two theatre critics discuss things they may write about this typical whodunit, but they are often sidetracked by their soliloquies, Moon's concerning his professional jealousy of Higgs and Birdboot's concerning his newly found "love", the actress playing Cynthia. As they talk, the telephone on stage begins to ring incessantly until Birdboot cannot stand it any more. He walks up on stage to answer it only to discover that Birdboot's wife, Myrtle, is on the line. Birdboot speaks to her and as he hangs up, the play suddenly starts again and he gets trapped in it, mistaken for Simon, leading to his inevitable demise as he executes the role to its end, just after recognising the dead body onstage as Higgs, the first string critic who was unavailable that night. Moon ascends the stage to unravel Birdboot's death, taking on the role of Inspector Hound. The actors playing Hound and Simon appear in the critics booth, having now taken the place of the critics and begin to comment on the onstage action, mockingly echoing the pompous manner the critics displayed previously. Major Magnus accuses Moon of being the madman, since he is not the real Inspector Hound, and he tries to run but Magnus shoots him. As Moon lies dying on the floor, Magnus reveals himself to not only be the real Inspector Hound but also Cynthia's lost husband, Albert, who had disappeared ten years earlier. Moon, however, also recognises him as third-string critic Puckeridge, who will now become the first-string as both Higgs and Moon are out of the way.