"Pretty Little Liars" is returning to ABC Family for a fourth season.

The show will first return with a special Halloween-themed episode on Tuesday, Oct. 23rd at 8:00 p.m. ET/PT, as part of ABC Family's "13 Nights of Halloween" event. However, season three will begin in earnest in January 2013, with four new one-hour episodes.

"Pretty Little Liars" ranked as cable TV’s No. 1 series of summer 2012 in viewers 12-34 (2.6 million/2.8 rating) and Females 12-34 (2.2 million/5.0 rating), and currently reigns as ABC Family’s No. 1 series of all time.

In the Halloween episode "This Is a Dark Ride," all Hell breaks loose when Aria, Emily, Hanna and Spencer go to a haunted party on the Rosewood Ghost Train.

"American Idol" vet Adam Lambert will appear on the episode, performing songs "Trespassing" and "Cuckoo."

Dave Lewis has been a Los Angeles-based entertainment writer and editor for nearly ten years. Originally hailing from Minneapolis, he moved to L.A. in 1996 to attend USC, before working for various periodicals and web sites including a lengthy stint at Variety.com. He joined the HitFix staff in 2011.