When Cayden James shows up at City Hall, he introduces himself as "Ben Gale". This is a reference to Benjamin Linus, Michael Emerson's character on Lost (2004); in his first few appearances in season two, he uses the cover identity "Henry Gale".
When trying to figure out a name for the new team, Curtis suggests they be called the Outsiders. This is a reference to the comic book team comprised of sidekicks such as Nightwing and Arsenal.
The motto on the license plate shown at 17:12 is "Land of Mist". This is likely a reference to Sir Arthur Conan Doyle's publication of the same name from 1926. Land of Mist is the third book in a series featuring George Edward Challenger, aka Professor Challenger. Unlike Doyle's creation Sherlock Holmes, Challenger is an aggressive, hot-tempered, dominating figure.