

Just as frequently, however, he was specifically identified by himself and others as a guy in a rat suit, or as a serious actor with a bad agent. In a running joke, it was sometimes implied that his character was actually supposed to be a rat, particularly in moments where he would appear to be in pain because someone was standing on his tail, because he was being tickled, something was on his prosthetic nose, etc. In the pilot episode, Lester was a puppet, but in every subsequent episode he was simply a clueless, and crude man ( Mark Ritts) in a tattered rat suit. Beakman was also assisted by his "lab rat" Lester. The assistant's name changed throughout the show's run for season 1, it was Josie (played by Alanna Ubach) for seasons 2 and 3, it was Liza (played by Eliza Schneider) and for season 4, it was Phoebe (played by Senta Moses). Over the years, Beakman was aided in his experiments by a female assistant just as in the comic strip on which it was based.

When his experiments were successful, he would often exclaim "Zaloom!" in a nod to his last name. The program starred Paul Zaloom as Beakman, an eccentric scientist who performed comical experiments and demonstrations in response to viewer mail to illustrate various scientific concepts from density to electricity to flatulence. Paul Zaloom costumed as Beakman in UNAM, 2014.
