Given the task definition and input, reply with output. In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Passage: Upon completing his military service, Loevy majored in Economics and Political Science at the Hebrew University of Jerusalem. At the same time, he dabbled in theater by participating in student productions, and worked at the national Voice of Israel radio station as a program editor, actor, producer, director, and skit-writer.. In 1967, upon completing his degree, he traveled to London to attend the London Film School (then known as the London School of Film Technique). Loevy's stay in London was cut short by the Six-Day War. Loevy returned to Israel to serve in the army. Soon after the war, he returned to London to continue his studies and worked as an assistant director at Elstree Studios for the British espionage/science fiction adventure series The Champions. At the same time, he was also an announcer for the BBC's Hebrew-language department.
 Link Information: consists of 30 episodes broadcast on the UK network ITV during 1968–1969. Question: What years did the show run for that Loevy was an assistant director on?

Answer: 1968–1969