Alex takes a trip to Cougartown when a sexy older woman wants to “play doctor” with him. Turns out it’s Izzie’s free-spirited mom, Robbie. She’s there to check on her sick little girl. The problem is, Robbie’s not quite up-to-speed with medical terms like metastatic melanoma. She thinks Izzie just has a weird mole or something. When Izzie realizes that her mom can’t handle the thought of Izzie dying, (hey, we can’t either!), she lets her believe all is well. It’s not.
Thatcher Grey comes to see Richard. He's 29 days sober and doing his steps. That includes making amends. The Chief asks the Grey girls to hear out their dad, as a favor to him. Meredith takes exception to this. Is the Chief her boss or her stepdad? Thatcher apologizes to both daughters. Lexie is eager to embrace him and introduce new man McSteamy. But Mark doesn’t want to meet the parent. Meredith wants nothing to do with Thatcher either.