Comedy “Two And A Half Men” will air an episode tonight that’s aptly titled, “The Immortal Mr. Billy Joel.” Billy is not making a cameo appearance in the episode, but you can tune in to see where the title comes from. During the episode, Charlie sneaks off for some cosmetic surgery, and his brother Alan goes out on the town pretending to be Charlie. The show airs at 9 p.m. EDT on CBS Television.