Robert's Divorce - S4.E24

While out for a family dinner, the Barones spot Robert's ex-wife, which prompts them to reminisce about the demise of his marriage. The family tells Amy the truth about Robert's failed marriage to Joanne, whom Frank not-so-affectionately refers to as ""a nutcracker."" The surprise sighting also brings back some personally harrowing memories for Robert – although, when Joanne suggests the ex-spouses get together, Robert seems intrigued.