The Actor and the Alibi

Mundon Mandeville, who runs a reviled repertoire theatre troupe, is murdered inside a windowless room. Everyone has an alibi. Father Brown is there as a favour to Flambeau to consult a 17-year-old into returning home to her worried parents who don't realise she has lied about her age in order to follow her dreams as an aspiring actress.

The show’s own verdict is on its page.