A member of the Suicide Squad.
- Killer Frost makes an ice joke, to which Captain Boomerang reacts with disgust. This is a homage to what is considered the worst Batman film, Batman & Robin (1997), in which the villain Mr. Freeze would constantly make bad puns about ice.
- Killer Frost calls Captain Boomerang "Captain Kangaroo". from the Captain Kangaroo (1955) (TV Series) .