In 1941, aged 14, as a member of Communist Youth League, he participated in many sabotage actions organized by the Liberation Front of the Slovenian People. In 1942, Žigon was captured by the Italian Army. As a minor, he was spared from execution and spent a year in an Italian military prison in the Province of Ljubljana. After the Italian armistice in September 1943, he was captured by the Wehrmacht and sent to the Dachau (his prisoner number was 61185), where he learned German.

He studied acting in Ljubljana and Leningrad. He graduated in 1952, from the Academy for Theatre Arts in Belgrade. On faculty for acting in Belgrade he was one of the first assistants. Because of his knowledge of the German language and manners, he often played cynical and cold German officers. He was best known for playing “Krieger”, chief of Belgrade Gestapo, in the popular 1970s TV series Otpisani and Povratak otpisanih.

In 1968, at the time of the student demonstrations in Belgrade, Žigon emerged and performed Danton’s Death; he played Robespierre for the students. The speech he made while his character was on trial caused the assembled students to explode into enthusiastic applause.