The God of Thunder's social network includes Odin, Loki, Heimdall, Sif
First Appearance: Journey into Mystery #85 (1962)
Played by: Idris Elba (HBO's "The Wire")
Origins: Chosen to guard Asgard because of his extraordinary eyesight and hearing.
Known For: Brother of Sif, Heimdall is the guardian sentry of Asgard. He stands on the bridge, keeping an eye out for any soul foolish enough to attack. He's also the first to see the pizza delivery guy.
Powers: While not quite on the same level as Thor or Odin, Heimdall is stronger than your average Asgardian warrior -- he's the place's first line of defense.