After is debut last year, J.J. AbramsLost quickly became a smash hit, and coupled with Abrams other show Alias, is turning Wednesday nights into a winner for the ABC network.

Despite high ratings, critically acclaimed writing and an early second season pickup, David Fury -- a key writer and co-executive producer of the castaway series -- has announced he will not be returning for the second season. Instead, Fury (who is best known for his work on Buffy The Vampire Slayer) will be working on a couple of other shows including Fox's 24.

"I'm very proud of 'Lost' and my contribution to the show, but for numerous personal reasons, I feel like it's time for me to move on to other things," said Fury. "I spent seven years of my career in one place working on Buffy and its spin-off series, Angel, and it's a lot of fun to work in different worlds. 'Lost' was a lot of fun, and I have a great deal of gratitude for J.J. Abrams and Damon Lindelof. I know the show will continue to be great, and I look forward to viewing it."

Fury currently has four Lost scripts to his name, including the fourth episode Walkabout, which revolved around Terry O'Quinn's character Locke and also featured one of the shows major plot twists. That episode has been nominated for a 2005 SyFy Genre Award.

"I think my favorite will always be 'Walkabout,'" Fury added. "It helped set the tone for what the show could be outside of the pilot. It was also served so well by the performance of Terry O'Quinn and some great production values and direction."

Fury will reunite with his former Angel colleagues at The Inside, which was co-created by Tim Minear and Howard Gordon.

"I'll be starting this Monday [April 11]," Fury said. "I'm very excited about it. Tim and I have been anxious to work on something together, and this was a nice opportunity. I had wanted at the very least to write a script for him, but there was a lot of backstage goings on with Tim and Howard, and they made it happen for Fox to bring me over. I'll be a full-time co-executive producer for the remaining six episodes left in 'The Inside's' 13-episode order. Then, as soon as I'm done with that, I'll be going over to '24.' I've been playing in the genre world for so long now, it will be interesting to go over there."

Fury will be following former "Star Trek: Enterprise" executive producer Manny Coto to "24."

Fury didnt rule out the possibility that he may return to work with Abrams again, this time to work on something new.

"I've been talking with Bad Robot, J.J.'s company, about possibly developing a show. I would love to develop with J.J., and he would love to develop with me, so we are going to try and make that happen," he said.

"Lost" airs Wednesdays at 8 p.m. ET on ABC.