The Mystery of Granny Susan's Fun Time Wig - S1.E7

When a wealthy matriarch is strangled to death during a video call with her horrified relatives, the woman's daughter employs the services of the Wild/Reid Detective Agency. The agency being Fergus's brainchild, Harry is as surprised as anyone to discover it exists but agrees to indulge him. Money seems to be the motive for the murder, but everyone who stands to inherit was on the call.