Tony Tackaberry to exit Lion TV USA after nearly two decades Tony Tackaberry is stepping down from Lion Television USA after more than 17 years with the New York-based prodco backed by All3Media, Realscreen has confirmed. Tackaberry (pictured) is to step down from his post ... January 25, 2021 Tony Tackaberry is stepping down from Lion Television USA after more than 17 years with the New York-based prodco backed by All3Media, Realscreen has confirmed. Tackaberry (pictured) is to step down from his post as CEO of the American offshoot at the end of January to explore a new venture. The veil on that new project will be lifted in the coming weeks, but Tackaberry will continue to collaborate with Lion on some existing projects.