(written from a Production point of view)
In Bjo Trimble's book On the Good Ship Enterprise, p. 259, she noted that "Cedric Taporco, one of the handsomest males I'd managed to locate, suddenly became a purple lizard! He enjoyed the day sticking his tongue, snake-like, out at startled girls. We'd hear a "Yeek!" and know where he was on the set."