Several other specialists appear less frequently in the series, such as Ralph Winslow (a lockman), Wally Whistler (an extremely absentminded lockman who once accidentally released a lion from its cage at the zoo), Jim O'Hara (a recently released burglar who still hasn't lost his prison pallor) and Herman Jones (a black lockman formerly known as "Herman X" when he was a black radical and "Herman Makanene Stulu'mbnick" when he was briefly Vice-President of the African nation of Talabwo). Other memorable associates/appearances include Wilbur Howey (a lockman recently released after a forty-eight year sentence [originally ten years, but he kept escaping and getting immediately caught), Roger Chefwick (a lockman who's crazy about model trains) and Fred and Thelma Lartz (a husband-wife driving team, but Thelma now does the actual driving because Fred has lost his nerve after nearly being run down by an Eastern Airlines flight on a Kennedy Airport runway).