In this Reliable Sources web extra, Newsmax CEO Christopher Ruddy talks exclusively with about his proposed tv rival to Fox News.

In this  Reliable Sources web extra, Brian Stelter interviews astrophysicist Neil DeGrasse Tyson on the return of 'Cosmos' to TV.

Tune in to "Reliable Sources" this Sunday at 11 a.m. Eastern! Here's a preview from the program's host Brian Stelter:

Good morning! I'll begin this morning's "Reliable Sources" with an exclusive TV interview with Christopher Ruddy, the chief executive of Newsmax Media, who is talking publicly about his plans to create a television and Internet rival to Fox News.

Here's a sneak peek of the interview:

[youtube http://www.youtube.com/watch?v=3elchU6oVHA&w=400&h=225%5D
BusinessWeek had an informative feature about Ruddy's plans a few days ago — check it out here.

I have two other big interviews to share: the first is with Liz Wahl, the Russia Today anchor who resigned on the air on Wednesday. "I cannot be part of a network funded by the Russian government that whitewashes the actions of Putin," she said in a video clip that immediately went viral. She'll tell me what happened right before and right after her on-air resignation.

The other interview is, for me, a pinch-me moment: it's with Neil deGrasse Tyson, the famed astrophysicist who is hosting "Cosmos," the prime time science adventure series that is premiering on Fox tonight. He'll tell me about the mission of the show and about whether he can help broker a peace in what some people call a war on science.

I'll also talk with two CNN commentators, Sally Kohn and Ben Ferguson, about what it's like to be a voice of opposition on Fox News and MSNBC. This discussion is inspired by a Columbia Journalism Review story titled "And from the left…Fox News." The story asserted this: "While the liberal hosts of MSNBC often skewer conservatives, the debates happen with villains who are not in the studio: lambasted, by proxy, in news clips. At Fox, they happen in person, with a real-live liberal who is often on staff."

I'll also have an update on the Al Jazeera journalists who remain imprisoned in Egypt, and I'll end the program with a tale of a single press release that misled so many media outlets this week.

Hope to see you at 11 a.m.,

–Brian