Board Thread:Questions and Answers/@comment-24520051-20161120235846/@comment-918732-20170126002508

And now I have come to believe the guy in the upper right corner is Slam Bradley. He looks just like Slam from, torn shirt and all, as seen here:

So my new list:

Sherlock Holmes, Detective Chimp, Angel and the Ape, Theo Kojak, Colombo, Sam Spade, Hercule Poirot, Dick Tracy, Maxwell Smart and Slam Bradly.

(I'm still missing one, the guy with the three women. And I guess the three women could be detectives too...)