'Double Bubble'

Darwin welcomes the new transplant team, but not everyone is happy to have all the attention on the newcomers. When the opportunity of a landmark operation comes up, will the transplant team be able to rise to the occasion?

Meanwhile, Chrissie is refusing to go home, despite Michael's pleas for her to leave the ward. Determined to prove that she is fine, she gets stuck into work. But when it all gets too much, will she admit that she's not coping?

Elsewhere, Dan is surprised when an old college friend starts working on Keller and he begins to recognise just how many changes he has made in his life.