PASADENA, Calif. — After the success it saw from resurrecting Jack Bauer and co. for another installment of 24, Fox is looking to bring back two more popular properties, the heads of Fox's TV group confirmed Saturday.

First, X-Files fans could be in for a return to the world of Mulder and Scully, as ongoing conversations are taking place to bring the series back in some form, CEOs Dana Walden and Gary Newman said Saturday.

But it's not something that would happen without stars David Duchovny and Gillian Anderson, Newman added, which presents a challenge.

Duchovny is currently working on NBC's Charles Manson drama Aquarius, and Anderson has two series on the air, The Falland Hannibal.

"It's a little bit hard," Newman said. "I really don't know how fast it could happen because of [the stars' schedules]. But there are ongoing conversations happening."

Creator Chris Carter would also be a part of the project, he added.

Dominic Purcell and Wentworth Miller in a scene from Fox's <em>Prison Break</em>.' Image: Prison Break Facebook

Meanwhile, ahead of Wentworth Miller and Dominic Purcell's reunion on Tuesday's episode of The Flash, Newman said Fox is open to discussions about bringing back Prison Break, on which Miller and Purcell starred as brothers wrapped up in a conspiracy.

However, he admitted that news of the rumored in-the-works return, which some news outlets reported this week, was "slightly news to us." But Newman said, "We've made it clear over the years that we'd bring Prison Break back in a heartbeat ... It'd be the perfect event series."

The only wrinkle, of course, is that the return would likely have to be a prequel. (Five-year-old spoiler alert: Miller's Michael Scofield dies in the 2009 conclusion of the series.)

"I think the audience forgives you quite a bit if you're bringing back one of their favorite shows," Newman said.

And what about that show Fox already brought back? The future of 24 is only slightly less murky than the shows currently looking to be revived.

While Fox is open to more 24, the series might have to continue without Kiefer Sutherland, USA Today reported.

"I look at everyone who surrounded Kiefer in the last installment, and I think it could work," Walden told the newspaper.

Do you agree? Could '24' continue without Sutherland? And what do you think of the potential returns of 'X-Files' and 'Prison Break'? Tell us in the comments, below.