The American sitcom Two and a Half Men, created by Chuck Lorre and Lee Aronsohn, premiered on CBS September 22, 2003. Lorre and Aronsohn are also its executive producers. The show initially centers on seven characters: the brothers Charlie and Alan Harper; Jake Harper, Judith Harper-Melnick, Alan's first ex-wife, Jake and Milly's mother; Rose, one of Charlie's previous one-night stands who continuously stalks him; Evelyn Harper, Charlie and Alan's wealthy, five-time widowed, bisexual mother, and Jake's grandmother; and finally Berta, Charlie's sharp-tongued housekeeper, who later joins the main cast starting with season 2 after playing a major recurring role throughout the first season. In season 9, the show is revamped when Charlie is struck and killed by a moving train. Walden Schmidt replaces him as the new owner of the beach house. He is a recently divorced internet billionaire. In season eleven, Jake moves to Japan and leaves the series. To replace "the half-man", Charlie's long-lost-daughter moves into the beach house after looking for her late father.