| Jack Cassidy |  Appeared in 3 Episodes , Murderer in Murder By The Book, Publish Or Perish, Now You See Him |
| Robert Culp |  Appeared in 4 Episodes , Murderer in Death Lends A Hand, The Most Crucial Game, Double Exposure |
| Eddie Albert |  Appeared in 1 Episode Dead Weight |
| Ross Martin |  Appeared in 1 Episode Suitable For Framing |
| Susan Clark |  Appeared in 1 Episode Lady In Waiting |
| Roddy McDowall |  Appeared in 1 Episode Short Fuse |
| Patrick O'Neal |  Appeared in 2 Episodes, Murderer in Blueprint For Murder |