Fox’s “Talkshow With Spike Feresten” won’t be back for a fourth season.

The Feresten gabber joins “Mad TV” on the cancellation heap as Fox opts to make over its Saturday latenight lineup.

Net earlier announced plans to launch a latenight franchise starring comedian Wanda Sykes at 11 p.m. this fall, in the “Mad TV” slot. Now Feresten’s 30-minute spot at midnight is open.

Fox said the network is still mulling over its options at midnight; according to Broadcasting and Cable, a comedy repeat is one possibility for the slot.

The network tapped Feresten in 2006 with an eye toward expanding the show to other nights of the week. In the same way that Conan O’Brien got his start on NBC, Feresten was a well-known comedy scribe (“Seinfeld”) who didn’t have much experience in front of the camera before landing his show.

“Talkshow” never made much noise at Fox, but the net did opt to showcase it earlier this year in the more visible 11 p.m. slot. And several “Talkshow” comedy bits became viral Internet video sensations — particularly one gag revolving around the digital TV transition.

Feresten and Mike Gibbons are exec producers on “Talkshow.”