I think that the late, lamented Mr. Patrick was almost as prolific as both KLS and John Karlen when it came to guest appearances on American television programs.
I can recall seeing Mr. Patrick's unmistakeably smiling and handsome Irish face on such shows as "Bonanza," "The Incredible Hulk," and "The Fugitive" (where, unfortunately, Mr. Patrick's character was swept overboard during a fierce storm, much like Joe Haskell's father apparently was, while out on one the Collins Family fishing boats off the coast of Maine).