WASHINGTON – Seven Democratic hopefuls take the stage Tuesday night ahead of the South Carolina primary on Saturday.

The 10th Democratic debate will reunite six contenders from last week’s heated match-up in Nevada, and will also welcome billionaire Tom Steyer back to the stage.

Here's what you need to know about Tuesday's debate:

When is the debate?

The two-hour long debate will take place in at the Gaillard Center in downtown Charleston, and is scheduled to begin at 8 p.m. ET.

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How can I watch the debate?

The debate will be co-hosted by CBS News and the Congressional Black Caucus institute.

It will air live on CBS stations and BET, while also being streamed live on CBSN, the network's streaming service.

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Who is moderating the debate?

The network has said that "CBS Evening News" anchor Norah O'Donnell and "CBS This Morning" co-host Gayle King will moderate the debate. They will be joined in questioning by "Face the Nation" moderator and senior foreign affairs correspondent Margaret Brennan, chief Washington correspondent Major Garrett and "60 Minutes" correspondent Bill Whitaker.

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Who has qualified for the debate?

The rules to qualify for the debate were functionally the same as the Nevada debate.

Candidates can participate if they have won at least one pledged delegate after the first three early contest states, or reach a certain level in polls.

As of Monday, seven of the eight remaining candidates have met either the thresholds. Hawaii Congresswoman Tulsi Gabbard has not qualified for South Carolina's debate.

Here are the candidates that qualified for the debate:

Former Vice President Joe Biden

Former New York City Mayor Michael Bloomberg

Former South Bend, Indiana, Mayor Pete Buttigieg

U.S. Sen. Amy Klobuchar of Minnesota

U.S. Sen. Bernie Sanders of Vermont

Billionaire philanthropist Tom Steyer

U.S. Sen. Elizabeth Warren of Massachusetts

More:Buttigieg campaign claims irregularities in Nevada caucus votes, seeks 'concrete' changes

When is the next debate?

After three debates this month, the Democrats are taking a bit of a break.

The next debate will be March 15 in Phoenix, hosted by CNN and Univision.

Tuesday's debate is the last debate before Super Tuesday on March 3, meaning the match-up is the final time for candidates to distinguish themselves from one-another on a national stage before 14 states and one territory vote.