Meredith, Alex, Izzie and Cristina compete in a surgical contest, with Bailey judging.

Despite the best efforts of the Seattle Grace staff, the code black situation escalates.

(Original Airdate 5/15/2006) Derek and Richard finish Burke's surgery as Denny successfully undergoes his heart transplant.

(Original Airdate 5/15/2006) Burke has been shot and Izzie has just cut Denny's LVAD wire.

Seattle Grace institutes a "date-and-tell" policy after the nurses complain of Mark's trysts; Cristina is forced to confront her feelings about Preston.

T.R. Knight expresses his appreciation for GLAAD and the work they do.

T.R. Knight expresses his thoughts on how one should "come out" and embrace themselves.

Jonas Salk announced he had discovered a vaccine for Polio, and Diana Ross, T.R. Knight and Kiera Knightely were born.