Upon returning to Israel, he helped to found Israel Television (now Channel One). For 15 years, he was the host of a popular Friday morning radio program on Arutz 7 called "Zikukim shel Adir," (lit. Adir's Fireworks, a pun on his name) commenting on news, politics and Jewish issues. He established a non-profit organization called 'Virashtem Otah' which extended aid to needy settlers in the West Bank. Zik claimed that the assassination of Yitzhak Rabin was a conspiracy and broke the story that Avishai Raviv was a member of the Israeli Shin Bet. He based his theory on a list of 58 unanswered questions about the assassination.