When Joan phones her the first time, Maureen the babysitter is watching the film Harlow (1965), which stars Martin Balsam as producer Everett Redman. Martin Balsam is the real-life father of Talia Balsam, who plays Roger Sterling's ex-wife Mona on Mad Men. John Slattery, who plays Roger, is married to Talia Balsam in real life, which makes him Martin Balsam's son-in-law.
Richard communicates to Joan that the fact that she has a young child doesn't fit into his retirement plans, and then later in the episode Joan tells him, "I thought about it and I'm sending my son away." Richard's reaction is an incredulous "what?!," and Joan continues, "no, I thought about what you said and I like you, too. And if I have to choose between you and my son, I choose you." Richard's response is to backtrack by saying, "that's not what I said," and Joan scolds him by saying, "that's exactly what you said." Richard's conciliatory reaction is, "well, I thought about it and I want to be a part of your life and your little boy, too." Some viewers were confused by this exchange and assumed that Joan was being serious when she offered to send her (four-year-old) son away. However, on the DVD commentary track for this episode, showrunner Matthew Weiner clarifies that Joan is absolutely being sarcastic when she says this, and furthermore, when he first heard that some posters on the internet couldn't discern that, he was very surprised. Weiner says that given Joan's tone and the context of the conversation, he had a hard time believing that anyone could watch that scene and not understand that Joan was being sarcastic.