Well this was an extremely short season… only 3 episodes. All of them were rather good though, with the first one standing out due to the actor chosen for the bad guy: William Shatner, playing an actor that is famous for playing a TV detective… pretty meta, but used in a fun way. Walter Koenig also guest-stars as a police officer. The third episode takes place in a society for people with extremely high IQs (top 2% of the world), the episode implies that Columbo’s IQ is rather high – possibly even in that 2% range – as well (though it is left to speculation). From the second episode we learn that Columbo has allergies.
Not much more to say for this short season except that is was entertaining, sorry.