In RPC there's various types for "role". One of them is "guestStar". So it's probably just a question of adding "guestStar" as a choice in kmttg Advanced Search form where actor, producer, director, etc. currently are available. I tried this quickly a few minutes ago and tried some searches on some generic names and also "ewing" and "reid" but got no matches. If you know of a particular guest star that should be showing up soon in upcoming schedule let me know and I can try that. Otherwise I'll assume it just doesn't work. EDIT: In particular, you should look at RPC data in kmttg guide or search results for "guestStar" keyword. (Use the 'j' keyboard shortcut after selecting a table entry to dump RPC data to message window).