'Amazing Race,' 'Survivor' returning

CBS picks up long-running reality competition series

CBS has ordered two more editions of "Survivor" and one more of "The Amazing Race."

"Survivor" will air for a 21st and 22nd cycle, with the Emmy-dominating "Race" earning a 17th round-the-world tour.

"Survivor" continues to win its time period every week, while "Race" posted year-over-year gains last fall, up 6% in the adult demo.

Between "Survivor," "Race" and summer's "Big Brother," CBS has three of the most durable reality franchises. Yet the network continues seeking something, you know, new. At least, a show created within the last five years. CBS hopes "Undercover Boss," airing after the Super Bowl, will be its next unscripted hit.