text: While unusual, it is not unheard of for a sidekick to be more attractive, charismatic, or physically capable than the supposed hero. This is most typically encountered when the hero's appeal is more intellectual rather than sexual. Such heroes (usually fictional sleuths and scientists) are often middle-aged or older and tend towards eccentricity. Such protagonists may, due to either age or physical unsuitability, be limited to cerebral conflicts, while leaving the physical action to a younger or more physically capable sidekick. This type of sidekick is rarely encountered in fiction, because the hero runs the risk of being upstaged by them. However, examples of successful such pairings include Detective Monk and his sidekick Sharona, Inspector Morse and his sidekick Detective Sergeant Robbie Lewis, Nero Wolfe and his sidekick Archie Goodwin, Hiro Nakamura and his sidekick Ando Masahashi, and Miles Vorkosigan and his sidekick cousin Ivan Vorpatril. In other media, The Green Hornet's sidekick, Kato, has (especially since the 1960s television series with Bruce Lee) been depicted as a capable man of action, for instance in martial arts. The earliest Doctor Who serials, particularly during the First Doctor era, had young male companions who were capable of the physical action that the elderly William Hartnell was not. This became more important as Hartnell's health declined during his tenure as The Doctor. This was not an issue with the following Doctors as they were cast with significantly younger actors.