Team Bartowski, previously known as Operation Bartowski, is the main spy team of the series that was assembled by NSA Director Diane Beckman and CIA Director Langston Graham when they were still serving under the US intelligence. The team consisted of Chuck Bartowski, Sarah Walker, former NSA Colonel John Casey, and Morgan Grimes. The team mainly operates out of their secret base Castle, hidden under the Buy More in Burbank. They also often utilize their heavily modified van during missions.