Pam does not feature in this story line because Jenna Fischer was out on maternity leave to have her child with her husband, Lee Kirk.
In this episode, Erin mentions she watched a film where Meryl Streep had two secretaries. This, obviously, is the film The Devil Wears Prada (2006), which starred Emily Blunt as one of the secretaries. Blunt is the real life wife of John Krasinski, who plays Jim.
Robert & Mrs. California are wearing matching outfits.
Maura Tierney, who plays Susan California, and Jenna Fischer had been known to be a pair of celebrity lookalike.