Elvis Costello & Sean Penn guested on the "Back Off, Mary Poppins" episode of this Charlie Sheen show
The episode, "Back Off, Mary Poppins" (at 9:30 p.m. on CBS) features ... when 
series stars Charlie Sheen and Jon Cryer are joined by Sean Penn, Elvis 
Costello and Harry Dean Stanton for the show's second-season premiere.