Two and a Half Men co-star Jon Cryer went on Conan tonight to respond to Charlie Sheen’s recent comments, in which he called him a troll. (Sheen has since issued a “half-apology” or “apol” to his former co-star.) This marks Cryer’s return to Conan. His last appearance on the talk show in January proved ominous. During the interview, Cryer quipped: “I’m checking TMZ, as I do every day, to know if I have to go to work at all.” The next morning, Sheen was hospitalized, leading to the actor’s rehab treatment, subsequent meltdown and firing as well as the show’s cancellation for this season.