Jack Norriss was the husband of Barbara Norriss, a woman who was driven mad by the demonic Undying Ones after the couple foolishly joined a cult devoted to them for kicks. Barbara was trapped in the dimension of the Undying Ones, but later became a host body for the spirit of Brunnhilde, the Valkyrie. When Jack recognized her, he refused to accept that the Valkyrie was not really Barbara and as a result became a sometimes unwelcome associate of the Valkyrie's teammates, the Defenders, though he was frequently of considerable help to the team, once even saving the Valkyrie from being burned on an inverted cross by the Sons of the Serpent.
On one occasion, Norriss even consented to have his mind transferred into the body of Kyle Richmond and fought alongside the team as Nighthawk for a time when Nighthawk's body had been usurped by Chondu of the Headmen. Eventually accepting that he had lost Barbara, Jack left the Defenders (after being paid $300,000 by Nighthawk) and used the money to fund his own mission to stop Ruby Thursday of the evil Headmen from running for president. He wrote a cheque for $100,000 for Ruby's campaign in order to get close to her and spent the rest of the money on a Bond-esque tuxedo filled with secret weapons and devices. While he was found out by Thursday, he was able to expose her to the American public, thus ending her bid for presidency. The Defenders soon managed to defeat her and the rest of the Headmen.
Later, he ended up as a file clerk working for S.H.I.E.L.D. who later made him a full field agent and assigned him to bring in the vigilante named Nomad (Jack Monroe). Jack eventually left S.H.I.E.L.D., dissatisfied over their handling of the Nomad situation. He is now an investigative reporter working for a local TV station (America TV), and has been of some use to Andrea Sterman when she was investigating Nomad's fate.