Curtis Holt mentions he thought Green Arrow was "Neal Adams" from data processing. Neal Adams is an award winning comic artist who is most known for his iconic run drawing Green Arrow in the late 70's and early 80's.
When Curtis makes his way into the bunker, he winds up running interference/intelligence for the team. In the series Justice League Unlimited (2004), Mr. Terrific (the superhero that the character Curtis is based off of) performs the same duties for the league from the watch tower.
Brie Larvan mentions her "favorite scene from My Girl (1991)", a reference to the scene where Macaulay Culkin's character is stung to death by bees.
At 13:24 Curtis says "Holy frak"; frak is the censor-friendly swear word from Battlestar Galactica (2004).
At 32:23 Felicity says they're "in a Die Hard (1988) movie with bees". The plot of the first Die Hard movie involved people trapped in a skyscraper with killers.