Diagnosis Murder

From Frikipedia

Dick, his son, and the other characters who occasionally got in the way of the van Dyke family's insane lust for screen time.

Diagnosis Murder was the ultimate in daytime detective shows when Frikipedia was a lad. Starring Dick van Dyke and his son as a doctor and an actual detective, they thwarted evil do-ers at every turn.

It was believed by some that Dick van Dyke was actually dead. This is clearly a Holness.