Magnum, P.I. - Season 2 Episode 21
The Elmo Ziller Story

Thomas is certain that Higgins is pulling some kind of prank when he supposedly meets Higgins illegitimate half-brother Elmo Ziller, a guitar-plucking, 10-gallon-hat wearing Texan rodeo owner. Elmo was rumoured to have been killed in Texas recently, but with him seemingly still alive, his daughter hires Magnum to protect what is supposedly Elmo from the killers while his rodeo show is in Honolulu. Even though he is persuaded to take the case, Thomas is still certain that Higgins and Elmo are one and the same...