Elvis Costello & Sean Penn guested on the "Back Off, Mary Poppins" episode of this Charlie Sheen show
[DOC] [TLE] Watch Two and a Half Men Season 2 Episode 1: Back Off ... - TV Guide [PAR] Sep 20, 2004 ... Watch Two and a Half Men: Back Off, Mary Poppins from Season 2 at ... Sean 
Penn, Elvis Costello and Harry Dean Stanton appear as ...