CHANGE the locks, switch on the alarm. Because one of TV's most dangerous men is on the loose again.

Theodore "T-Bag" Bagwell - the serial killing sex offender from Prison Break - is back on the streets.

They've saved the world more than once.

They've rehabilitated Sylar.

They've defeated evil showman Samuel.

They've saved the cheerleader ...

But it seems Heroes cannot save themselves.

News from the States is that Heroes is increasingly looking likely to be cancelled because of ratings lower than a limbo bar.

The future of the series has yet to be officially announced by NBC but sources claim that it won't be renewed, even for a final series.

Instead, there'll be a television movie to tie-up loose ends.

And if that's starting to sound like what happened to Prison Break, that's 'cause it is!

It's yet another twist in the saga surrounding the future of Heroes.

There had been speculation that NBC might commission a short 13-episode final season but that now looks unlikely.

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First he was evil paedophile T-Bag in Prison Break.

Then he was sinister showman Samuel in Heroes.

Now Robert Knepper is joining the action in Stargate Universe.

He'll play scary Simeon, a member of the Lucian Alliance, when SGU's second series starts in the Autumn on Syfy.

Hard to keep a bad, bad man down, eh?

Funny how things can change, eh?

Last season, Heroes was all but dead and buried - seemingly damaged beyond repair by poor storylines, wooden scripts and a loss of direction.

Lost, meanwhile, was starting to pick up again as the real battle between good and evil; finally kicked off.

Now it's the other way round.

The arrival of Robert Knepper, as sinister carny showman Samuel Sullivan has breathed new life into the show.

Best-known as sick psycho T-bag from Prison Break, he's made Heroes unmissable, despite a dodgy Oirish accent.

At the same time, the return of Claire Littleton as a poor man's Danielle Rousseau in Lost has been ludicrous, the acting terrible.

Add to that the duff Dogen, leader of The Others in the temple, and Lost is in real danger of turning into a bad joke.

Oh for the days of the light suddenly bursting from the hatch ...

Anyway, if you're also a fan of Robert Knepper, then you'll be amazed by just how many TV shows and movies he's appeared in.

Click to the next page for the full list!

Fans of Prison Break sent their questions to games developers Deep Silver recently for Robert Knepper to answer during the Prison Break The Conspiracy videogame Day.

The game is due out on the 26th of March. We will post the review on here...