sentences:  Email text is presented as voice-over by Serafinowicz (as the original advertisement), Davis (as Praemus) and Savage (as the Subject) with Walliams as the one of the subject's friends.Ayoade plays a computer consultant, presumably Maurice Moss (due to the fact the character wears the same clothing as Moss, notably the short sleeve shirt and tie and the big glasses) from Linehan's show The IT Crowd.Linehan makes a director's cameo as the doctor in the final scene although his face is not seen.