With its iconic host set to retire, brand-exposure force The Price is Right faces challenge of change.

From its block party-vibe theme song to its trademark "Come on down!" call, few TV programs have entered American popular culture like The Price is Right. So when Bob Barker, the show's host and executive producer of 35 years, announced his pending retirement last week, the news drew international headlines.

"It's part of Americana to say you were even just in the audience," explains ...