The White Queen (2013)

S7E18 Pumpkin Particle Peril

On Halloween, Alex is thrilled that they have a mission in L.A. However, chaos ensues when a particle physicist accidentally brings ghosts to life, and sinister pumpkins start wreaking havoc across the city. As if that weren't enough, the Spies find themselves on the brink of being pulled into another dimension. This Halloween has taken a wild turn!