A stampede at a comic book convention leads to an influx of colorful characters in the ER; Mark continues to make life difficult for Jackson; Ben returns and realizes Bailey has moved on.
An accident causes Ted to re-evaluate his life and his relationship with Stella.
Ted wonders if he should explore other career options; Marshall tries to lure Ted to the roof for a surprise birthday party.
The captain's wife becomes a victim when a union dispute goes awry, and it is up to Monk to figure out what really happened.
Sam finds himself in the midst of a dangerous house call; Pete and Addison decide to take their relationship to the next level; Violet enters a friends-with-benefits pact with Cooper.