Well, what can one say, except that this is certainly an episode of Mrs. Columbo? In “A Riddle for Puppets,” our heroine stumbles upon a mystery involving a ventriloquist (Jay Johnson) who begins to hear voices from his dummy. When those voices lead him to stab his mentor to death, it’s up to Kate Columbo to sort of stumble across some clues and make some leaps the audience doesn’t see to bring the killer to justice, with the help of a clown dummy.  Or, maybe he isn’t brought to justice? We don’t get to see that, either. The guest for this one is Abed Gheith, so we talk about a whooole lot of other things aside from this. What else? Oh, a Mrs. Columbo reboot for the CW; the Columbo-as-Antibody theory; the concept of television spinoffs; basic sitcom structure; Mama’s Family (???); the films of Jacques Tati; etc. Come on, we deserve some slack, as we’ve been here twice before. It’s about the journey.