Jesús Nieto was a highly influential Spanish voice actor and dubbing director, recognized as a pivotal figure in the history of dubbing in Spain. Born in Ciudad Rodrigo, Salamanca, in 1927, he moved to Madrid in the early 1950s where he began his career in radio and theater before being discovered by a talent scout. His work as a voice actor was extensive, and he was renowned for providing the Spanish voices for a vast array of international stars, including Marlon Brando, Kirk Douglas, Clint Eastwood, Peter Falk, Henry Fonda, Clark Gable, Rock Hudson, Marcello Mastroianni, Anthony Perkins, and Frank Sinatra, among many others. He is particularly remembered for his iconic dubbing of Peter Falk in the series Colombo and Ed Asner in Lou Grant.

In addition to his acting, Jesús Nieto made significant contributions behind the scenes as a director and industry organizer. He co-founded DOYSON, the first dubbing cooperative in Spain, and served for many years as the artistic director of the Arcofón studio. He was also a key advocate for actors' rights, instrumental in creating the first professional agreement for the dubbing industry in 1979. His legacy is defined by his work directing other actors, where he was known for his ability to prioritize performance over technical demands.

Regarding the specific example of the animated series Dogtanian and The Three Muskehounds, there are conflicting reports about which character he voiced. Some sources, including streaming platforms, credit him with the role of Pontos (the character based on Porthos). However, other detailed cast listings identify him as the voice of Dogos (the character based on Athos). Despite this discrepancy, these records consistently confirm his participation in this notable Spanish-Japanese animated production from the early 1980s. Jesús Nieto passed away in January 1999.