How's this for a Halloween party?

The Green Ranger, Leeloo from The Fifth Element, Bob Ross, Catwoman (the Halle Berry version), before-and-after Axl Rose, Michael Jackson, Pee-wee Herman, a kid from The Sandlot, a horse that looked like a cow, and a table lamp.

Who was who? Watch as the stars of The Magicians, The Expanse, Dark Matter, Wynonna Earp, Van Helsing, Z Nation and Incorporated reveal their best Halloween costumes.