This week, Carter tries his best to put on a brave face as he slowly recovers, Mark and Corday's parents seem to be having some fun together, an exhausted Chen continues to try and take on Carter and Lucy's workloads, Carol treats two high school girls who may have an STI, Abby gets a feeling that a patient may be worse off than he seems, Luka and Benton butt heads over a surgical case, and Lucy's mom comes to collect Lucy's belongings.