Champagne for One (2) A Nero Wolfe Mystery : Season 1 Episode 3

Archie is standing in for a friend at a party for unwed mothers when one of the guests drops dead. Through she had often talked about killing herself and was known to carry cyanide, Archie does not believe her death was suicide. A little digging uncovers the connection that proves his hunch, and Nero helps bring the killer to justice.