With all of the recent discussions regarding TOS guest stars, here’s another question to ponder: What guest stars commonly seen on other TV shows during the mid- to late-60’s would you have liked to have seen guest on Star Trek (but who never actually did)? What type or role would you envision them playing… and would they have been better than an actual guest star in a particular role? One I can think of right off is Nehemiah Persoff. A great character actor who could play a role with a remarkable bit of depth and subtlety, he could have been a great a bad guy with sorta good intentions, such as Ambassador Hodin in "The Mark of Gideon" (although David Hurst did a pretty good job in his own right). Your nominees?