Its not unusual for long-running filmed series to make at least one episode set within a film and or television production environment. Sometimes, its a comedy episode, or a dark serious episode like this, which also still contains knowing industry in-jokes and references. Also, it saves some production budget on building sets, as they can just turn the camera around onto the reality of the production, particularly if its a series shot on a backlot.
Phil Morris is the son of Greg Morris, the actor most well-known as Barney Collier in Mission: Impossible (1966) and Mission: Impossible (1988).
This episode aired exactly 2 months to the day that singer Britney Spears shaved her own head in one of her many public meltdowns.