Lak Rana

The doctors form two teams to operate on conjoined twins; Bailey uses Meredith as a buffer between her and Ben; Alex learns a tough lesson; Teddy asks Cristina about Henry's surgery.

A highly dysfunctional blended family is forced together when they realise a reported virus is actually the onset of the undead apocalypse.

JD enlists the help of Elmo from the Muppets to teach the gift of compassion to a blunt intern Denise but is disappointed when even Elmo can't make Denise more empathetic. Elliot's intern meanwhile, boasts that she has her mentor wrapped under her little finger.

Rebecca and Jack suffer the stresses of raising a family. Beth takes action to find out if William is using drugs again. Kate struggles with her goal of losing weight.