EXCLUSIVE: Spike TV has renewed two of its highest-rated non-scripted series. The network has picked up a 26-episode fourth season of Auction Hunters, which follows prospectors Allen Haff and Ton Jones in their quest to win auctions, dig for abandoned historical treasure and sell them for a profit. The network also has ordered 13 episodes of American Digger, starring the American Savage team, led by former professional wrestler-turned-modern-day relic hunter Ric Savage. Auction Hunters and American Digger, which aired together on Wednesday night and are both produced by Gurney Prods., will go into production on their new seasons this fall for a 2013 premiere.

The recently completed season three of Auction Hunters, which included a live season premiere, averaged 1.9 million viewers and improved the Wednesday 9 PM timeslot with Men 18-49 by +102% and Men 35-49 by +121%.  The debut season of American Digger  delivered 1.2 million viewers and improved the Wednesday 10 PM timeslot with Men 35-49 by +36% and +11% with Men 18-49. “We are thrilled to bring back new episodes of two of our most popular shows that speak to the network’s mission of delivering bold, non-scripted entertainment with real stakes”, said Spike TV’s EVP Sharon Levy. Auction Hunters and American Digger are executive produced by Scott Gurney and Deirdre Gurney.