Martin Sheen

From Two and a Half Men Wiki

Martin Sheen is the real life father of Charlie Sheen. In the show he plays the father of Rose. He stars in the episode where Charlie and Rose get very drunk and end up sleeping together, in the episode he meets Charlie's and Alan's mother Evelyn Harper. After awhile Evelyn gets sick of him and wants to get rid of him. (More information once we get the episode on a article)