According to Drea de Matteo on the Blu-Ray commentary, she says there was a deleted scene that featured Agent Robyn Sanseverino confronting Christopher and telling him that she will get him for what he did.
After he moves back in with Carmela, Tony is watching the film It's A Gift (1934) while eating ice-cream. This is the same film he watches in the Season 3 episode "The Telltale Moozadell" as he lays in bed eating cake. This is perhaps a signal to Carmela that nothing really has changed with Tony.
The episode won an Emmy Award for Outstanding Writing for a Drama Series.
Terrence Winter admitted that he wrote the episode in a single draft over three days at the end of a two week deadline after procrastinating for the first 11 days under the pressure of writing the most important episode of the season.