When Darien's brother dies unexpectedly, he finds himself working for a top-secret agency disguised as the Department of Fish and Game. He reported to Charles Borden, a.k.a. “The Official.” As long as Darien played ball with the government, the Official supplied Darien [a.k.a. “Solution Beta”] with the needed counter-agent to keep him from going insane. Meanwhile, Darien is the target of a variety of nefarious no-goods who seek to discover his secret and profit from its powers.

"There once was a story about a man that could turn invisible. I thought it was only a story until it happened to me. You see, there's this stuff called quicksilver that bends light. My brother and some scientists made a synthetic gland and that's where I come in. You see, I was facing life in prison, so we made a deal, they put the gland in my brain, I walk free. The operation was a complete success, but that's where everything started to go wrong."

                 -- Darien Fawkes (Opening voice-over narration)

Each time the Quicksilver gland activated, it cost the agency $3000 in counter-agent to re-stabilize Darien’s metabolism. Another drawback to the gland is that when Darien gets sexually or emotionally agitated (fear) he involuntarily turned invisible. Because of this, Darien hadn’t been with a women in two years. An experimental “Adenaline Inhibitor” was available to counteract the effects of the Gland. Unfortunately, while the inhibitor, kept Darien from turning invisible, it also built up a toxic backlog of chemicals that eventually would kill Darien, if not purged from his body. A government scientist named Claire Keeply, a.k.a. "The Keeper" administered the counter-agent that kept Darien stabilized. Agent Robert Albert Hobbes was assigned to monitor Darien's movements while on assignment.

To alert Darien to when he needs a counter-agent, The Keeper placed a small chemically sensitive tattoo on his wrist (a snake biting its tail) to let Darien know how long he can go before his next fix. Before the colors on the tattoo completely fade, Darien must be injected with the antidote to stay sane or else his brain's higher functions degrade and he reverts to a primal state of savagery filled with dark and menacing impulses. If Darien is not kept in check with an antidote, he will go ballistic and kill.

Eventually, The Keeper discovers a cure for Darien's predicament and against orders from "The Official" injects Darien with a special formula that allows Darien to maintain his sanity and retain his invisibility powers. With his Quicksilver madness in check, Darien joins the FBI but returns to The Agency to pursue a life of a good guy. Before taking his job back with the Agency Darien demanded better hours and pay as well as the reinstatement of Claire Keeply (fired for disobeying orders). Note: The Agency, originally under the auspices of the Department of Fish & Game, later reported to the Bureau of Indian Affairs and finally the Department of Human Services.

TRIVIA NOTE: The Invisible Man as a TV character first appeared on the sci-fi drama THE INVISIBLE MAN/CBS/1958-60. Based on the 1897 novel The Invisible Man by H.G. Wells, this sci-fi drama starred English scientist Doctor Peter Brady whose experiments with light refraction had rendered himself invisible. Putting his new found ability to good use he began working with British Intelligence as a highly effective espionage agent, thwarting the sinister organizations that threatened the European continent. The actor playing Doctor Brady was never seen on the series, always being concealed in bandages. Producer Ralph Smart never released the name of the actor who played the invisible man, probably in hopes of adding a little mystery/authenticity to the series. Later sources reveal Johnny Scripps played the man beneath the bandages and Tim Turner provided his voice laid in during post-production dubbing sessions. An updated version of THE INVISIBLE MAN/NBC/1975-76 starred David McCallum as Dr. Daniel Westin, a US Government research scientist who tried to keep his experiments of invisibility out of the hands of the US Military. While he attempted to find an antidote for his invisibility he worked for KLAE Corporation disguised in sophisticated rubber disguises (a la MISSION IMPOSSIBLE). When he wanted to disappear he just removed his synthetic rubber skin and Poof!, he was not to be seen.

Movie actors to portray this unseen hero/menace included Claude Rains, Vincent Price, Jon Hall, and Arthur Franz as well as Kevin Beacon as scientist Sebastian Crane in the motion picture Hollow Man (2000).