The seventh Democratic debate — and the last one before the Iowa caucuses — will air Tuesday night, pitting six of the 12 remaining White House hopefuls against each other in the smallest matchup of the 2020 election cycle.

Here’s what you need to know ahead of the nationally televised contest.

When and where is Tuesday’s Democratic debate?

The debate will kick off at 9 p.m. EST and is slated to run for two hours. It’s being held at Drake University in Des Moines, Iowa, a traditional battleground state looked to as an election bellwether.

How can I watch the debate?

The debate will air live on CNN, and can also be streamed through the network’s Web site or its apps.

Which candidates made the January debate line-up?

The following six candidates will square off Tuesday night: former Vice President Joe Biden; Massachusetts Sen. Elizabeth Warren; Vermont Sen. Bernie Sanders; South Bend, Ind. Mayor Pete Buttigieg; Minnesota Sen. Amy Klobuchar; and billionaire hedge-funder Tom Steyer.

Which familiar faces won’t be on stage?

Businessman and outsider candidate Andrew Yang will have to watch the debate from afar, as he failed to make the Democratic National Committee’s polling thresholds to appear Tuesday night. Meanwhile, New Jersey Sen. Cory Booker suspended his own foundering campaign on Monday, having previously failed to make the cut for December’s debate. And billionaire former New York City mayor Mike Bloomberg, who is self-funding his campaign, failed to make the mark despite polling at 5 percent in most surveys.

Who is standing where on the debate stage?

From left to right, the candidates will stand in the following order: Steyer, Warren, Biden, Sanders, Buttigieg and Klobuchar.

Who is moderating the debate?

The debate will be moderated by a trio of journalists from CNN and The Des Moines Register. They are CNN anchor Wolf Blitzer, CNN political correspondent Abby Phillip and The Register’s chief political correspondent, Brianne Pfannenstiel.

What topics are expected to be discussed at the debate?

In addition to evergreen topics including health-care, immigration and gun control, the debate will likely feature a pronounced emphasis on foreign policy in light of recent tensions between the US and Iran. With House Speaker Nancy Pelosi set to deliver articles of impeachment against President Trump to the Senate, the looming specter of a trial is also likely to be raised — particularly because senators now comprise half the field.

Sparks may also fly between Sanders and Warren, after it emerged that in a Dec. 2018 conversation between the two, Sanders purportedly told Warren that a woman couldn’t win the presidency. After CNN reported the alleged comment on Monday, Warren said in a statement that it was true, while Sanders told the network that it was “ludicrous.”

How are the candidates polling?

A Monmouth University poll released on Monday found Biden holding a 24-percent share among likely Democratic caucus voters in the Hawkeye State. Sanders, Buttigieg and Warren are currently in a logjam at the middle of the pack, holding 18-, 17- and 15-percent, respectively. Klobuchar came in at 8-percent, while Steyer attracted half that.

When is the next Democratic debate?

Following Tuesday’s contest, the candidates will next debate on Feb. 7 at Saint Anselm College in Manchester, New Hampshire. That event kicks off a busy month for the candidates, with two additional debates scheduled for Feb. 19 in Las Vegas, Nevada, and Feb. 25 in Charleston, South Carolina.