NBC's freshman drama Knight Rider is undergoing a major retooling, bringing it closer to the original 1980s series. Among the changes, the options of three regulars on the show -- Sydney Tamiia Poitier, Yancey Arias and Bruce Davison -- were not picked up beyond the initial 13-episode order.

"It's a reboot," "Knight" executive producer/showrunner Gary Scott Thompson said. "We're moving away from the terrorist-of-the-week formula and closer to the original, making it a show about a man and his car going out and helping more regular people, everymen."

The Hollywood Reporter claims such a change would make Knight Rider a better fit into NBC's newly rebranded crime drama Wednesday lineup alongside "Life" and "Law & Order."

The revamped Knight Rider will kick off with the two-part Episodes 10-11. NBC is planning a major push, including possibly airing Episode 10 on Sunday after an NFL football game in January, with the conclusion airing the following Wednesday.

Such a move would bring Knight Rider back to Sunday night, where the two-hour movie/backdoor pilot drew big ratings in February.

The series it spawned has been struggling in the Wednesday 8 p.m. slot, dropping last week to a season-low 5.1 million viewers and a 1.6 rating/4 share in adults 18-49.

The retooling had been put in motion long before the full-season order for Knight Rider three weeks ago. The UMS/Dutch Oven series is now filming Episode 15.

There are no immediate plans to add new regulars to the show, which will focus on the five remaining characters: Mike (Justin Bruening), Sarah (Deanna Russo), Billy (Paul Campbell), Zoe (Smith Cho) and KITT. The producers also are looking to do stunt guest castings.

Thompson stressed that the decision to let the castmembers go was a difficult one tied to the show's change in direction and had nothing to do with the actors.