Synopsis by Hal Erickson
Miraculousy, Meredith's mom Ellis (Kate Burton) becomes lucid for the first time since being stricken with Alzheimers'. Unfortunately, Ellis' first words are not entirely flattering to Meredith (Ellen Pompeo)--in fact, they're downright abusive. Meanwhile, a patient's toxic blood may prove dangerous to three of the surgeons; Izzy (Katherine Heigl) has quite a conversation with the first client at the Denny Duquette memorial clinic; Cristina (Sandra Oh) gives serious consideration to Burke's proposal; and the eminent retirement of Dr. Webber (James Pickens Jr.) results in "competition fever". The episode ends as George (T.R. Knight) and Callie (Sara Ramirez) return from Vegas with a big surprise--as if we couldn't have guessed the nature of that surprise from what took place in the previous episode!