CBS will air another week of reruns of "The Late Show With David Letterman" beginning Monday, quelling rumors for now that a guest host will fill in for Letterman while he recovers from heart surgery.

Network officials remain tight-lipped about the idea of using a substitute host. Suggestions have ranged from out-of-work Jerry Seinfeld to red-hot Regis Philbin.

"We're talking about it daily and taking it on a week-by-week basis," CBS spokesman Chris Ender said yesterday.

Next week's slate of reruns will be chosen via the Internet. Fans can vote for their favorite episode at www.cbs.com/lateshow and pick any "Late Show" that has aired on CBS in the past 6 1/2 years. The top five favorites will air.

In its first week of repeats, "The Late Show" drew an average of 3.6 million viewers. That is down more than 2 million from the previous week of first-run episodes, one of which included an appearance by first lady Hillary Rodham Clinton.

Letterman publicist Steve Rubenstein said his 52-year-old boss is continuing to recover at an undisclosed location from quintuple bypass surgery two weeks ago. "Dave's still doing great," he said.