On July 11, 2012, during the filming of an episode, in which she was guest-starring, Kristin Chenoweth was struck by a falling piece of lighting equipment. She was knocked unconscious by the blow, and was taken to the hospital in an ambulance. After several months of recovery, in which it was unsure if she would be able to return to her role, Chenoweth reported in September 2012 that her medical issues included not being able to "form a sentence after it happened", a skull fracture, and continuing pain in her ribs and hip.
The series tradition continues - starting the fourth season, episode titles are now four words long.
Nathan Lane and Christine Baranski previously appeared together in the film, The Birdcage (1996), and also off-Broadway in Lips Together, Teeth Apart, and The Man Who Came to Dinner.
This episode introduces the character of Clarke Hayden, played by Nathan Lane. He appears in 15 episodes in total.
Archie Panjabi (Kalinda Sharma) & Marc Warren (Nick Savarese) both worked on Life on Mars (2006), although did not share any scenes.