Conan O'Brien Smokes Weed With Seth Rogen on Live TV Ahead of Retirement TV Earlier this month, it was confirmed that the 58-year-old TV host would be ending his show, which premiered in 2010 on TBS, due to poor ratings in 2020-21 season. Jun 24, 2021 Conan O'Brien is letting himself loose on TV. In a new episode of " CONAN", the 58-year-old TV host shared a joint with guest Seth Rogen as one of his shenanigans leading up to the finale of his TBS series. During the Wednesday, June 23 episode, Conan shared that he would be having a lot of free time in hand after wrapping up his talk show. He asked Seth to recommend things which he could do to kill time. The "