About a week ago I was watching a Route 66, and checked the cast at the beginning, and discovered Grayson Hall was in it!
And several days before that, I was semi-watching a Naked City. As it was going off I noticed the cast, and it had Mitch Ryan (and Dustin Hoffman!). If I click record on the DVR before it goes off, it picks up the full program, so I hurriedly recorded it and checked them out the next day.