Nathan from Misfits will not be returning for Season three… Channel 4 has posted a new mini episode explaining his disappearance from the show:
"This exclusive 12 min online film gives fans a chance to say goodbye  to motormouth Nathan, who armed with a new superpower, has got a plan to  go out in style. His target - Las Vegas. With Marnie and little Nathan Jnr in tow, Nathan plots to use his new  superpower to scam the casinos. As ever with Nathan, it’s a sure-fire plan that can’t fail. Except it  does…and he finds himself on the run. Short on options, Nathan tries to call an old friend…"
-Channel 4
http://www.channel4.com/microsites/M/misfits/main.html