Hey Scrubs fans: Miss out on Zach Braff's early days as medical rookie J.D. Dorian? Catch up on the pilot — and other installments featuring guest cuties like Brendan Fraser and Felicity's Scott Foley — in NBC's seven-episode "Scrub-a-thon." Five shows air June 25 from 8:30-11 pm/ET and two more air June 27 at 8:30-9 pm/ET and 9:30-10 pm/ET.