Is there a Arsenic and Old Lace radio play?

Yes, there is a radio play adaptation of the play Arsenic and Old Lace, written by Joseph Kesselring. The radio play was first aired in 1941, and was adapted by Howard W. Koch and produced by the Mercury Theatre on the Air. The radio play starred Boris Karloff as Mortimer Brewster, Orson Welles as Jonathan Brewster, and Agnes Moorehead as Abby Brewster.