Captain Cold somehow makes contact with the planet Venus and a bizarre race of three headed beings agree to aid the Legion of Doom. Ah, but the Legion should know that there really isn't as much honor among thieves outside of Earth as there is on it.
Here's "Invasion of the Fearians":
You know what they say about a man's grasp exceeding his reach? The Legion has learned and forgotten that lesson more times than anyone cares to count.