T.H.E. Cat often appeared in an all black outfit carrying rope and grappling hook to scale walls and cross buildings to rescue someone in peril or get to the bad guys. While he might on rare occasion use a gun, his most frequently employed weapon was a dagger, kept up his sleeve (referred to as his cat's claws), which he can throw with great accuracy. Other regulars on the show were R. G. Armstrong who played Capt. MacAllister (San Francisco Police Department) whom T.H.E. Cat sometimes would work with. Robert Carricart was also in the show as Pepe Cordoza who was T.H.E. Cat's friend and occasional informant who ran a jazz club called "Casa del Gato" (House of the Cat). The cool introduction jazz theme is by Lalo Schifrin.
T.H.E Cat was one of the first TV series to feature martial arts as the type of fighting system used by the "Hero", as opposed to a boxing style of street fighting. Whilst the fight sequences were not in the same league as those on The Green Hornet, starring Bruce Lee, it did feature martial arts style kicking and punching. In this sense the show was ahead of its time. The martial arts style of fighting on TV shows in the 1960's was rare until Bruce Lee became well known and then every "Hero" had to be a martial arts expert.