TRYING TO MAKE A DIFFERENCE – When the surgical interns are given an impromptu medical quiz with a chance to assist in surgery as the prize, only Emily and Cassandra are left standing. After an STD outbreak at a local high school becomes an issue, Emily reluctantly agrees to speak to a group of high school girls about safe sex. Meanwhile, Emily continues to try to forget about her feelings for Will, but finds the task easier said than done. Kelly McCreary, Michael Rady and Necar Zadegan also star. David Warren directed the episode written by Joanna Johnson.