 Isaacs found " Say Hello to My Little Friend " the " most difficult [ episode ] to shoot " as one of the character 's realities was fabricated and had to disappear by the end . To prepare himself for the episode , he imagined that he had suddenly lost his own child or that something awful happened to his family . While Isaacs had " played cheesy disco music " through filming the majority of the episodes , he played nothing during the filming of " Say Hello to My Little Friend " . During a scene where Michael sits on the floor and starts crying , Isaacs had " no idea what came out of [ his mouth ] " . That scene was shot three or four times with a different performance by Isaacs each time ; the actor did not know which take Innes would use . 
