Twenty contestants arrive at a castle in Scotland to play the ultimate murder mystery game.

The first murder raises suspicions as the contestants are buried alive; a player is banished.

The next murder shocks everyone; while a player is banished, another makes a dramatic discovery.

Cracks start to show in the treacherous trio as the game's pressure begins to weigh on one of them.

A Traitor raises suspicions; a mission gives players a chance to raise the prize pot over $100,000.

The game has a new lifeline, but for three players, being On Trial puts them closer to murder.

A Traitor’s mask begins to slip; ghosts of former players return; a plot twist unfolds.

One player must make the ultimate decision; a Traitor raises suspicion; a brutal roundtable ensues.

During the penultimate day, alliances are broken and trust between the Traitors is questioned.

After a last mission and roundtable, either the Traitors or Faithful will win the prize pot.

The cast of “The Traitors” settles the score on all the lies, murders, banishments and treachery.

An all-star cast arrives in Scotland; the Traitors are chosen, but there’s a twist this time around.

The Traitors want a newcomer; a mission reveals hard truths; the first murder and banishment occur.

The Traitors are given a daunting task for their next murder; the players face a dark mission.

The Traitors' next murder is done in plain sight; one player must take their last breath.

The castle welcomes a new arrival; the Faithful fight back; one of the Traitors is in the hot seat.

The Traitors start to turn on each other and face a difficult dilemma that could backfire.

The Traitors discover whether their seduction was successful; Alan has a deadly surprise.

The Traitors find their backs against the wall; a special guest appears during a beastly mission.

A Faithful and a Traitor clash; a Faithful must decide their fate after being given an ultimatum.

The Faithful seem to be closing in as doubt spreads among one Traitor’s loyal supporters.

The toughest mission yet occurs on land, air and sea, with the Faithful or Traitors winning it all.

The cast of “The Traitors” airs their grievances regarding murders, banishments and treachery.

A new all-star cast arrives in Scotland; before the Traitors are chosen, a decision must be made.

Three new players enter the game; the Traitors draw their first blood, and a player is banished.

The Traitors must meet outside of their tower to commit their next murder in plain sight.

A dramatic murder casts suspicion on two Faithfuls; a Traitor must stay out of the spotlight.

With their trust shaken, the Traitors must move forward; the limits of an alliance are tested.

With tensions high, the Traitors must still work together; two dangerous Faithfuls hatch a plan.

The Traitors must murder face-to-face in the most dramatic send-off the castle has ever seen.

The Faithful seek to close the lid on the coffin theory; an alliance of gamers sparks suspicion.

The Faithful must think like a Traitor in the mission; a rivalry comes to a head at the round table.

One Faithful faces a big decision; the mission offers the players a chance to win a great power.

With a big announcement and the final mission, either the Faithful or Traitors claim the prize pot.

The cast of "The Traitors" air their grievances regarding murders, banishments and treachery.

Another new all-star cast arrives in Scotland at night and the game starts faster than ever before.

Some overwhelming evidence is brought to the roundtable; the Traitors must murder in plain sight.

The Faithful are given a chance for vengeance; the mission results in a brutal end for one player.

A fiery mission results in several players up for murder; there's a big swing at the roundtable.

The mission offers the chance to stop the night's murder, but only if the Faithful stick together.

The Faithful plan a coup and one Traitor is accused to their face; the roundtable brings difficult decisions; with the temperature in the turret at its boiling point, the Traitors must pull off the bloodiest murder the castle has ever seen.

A bloody banquet shakes the whole castle; Traitor trust teeters; the mission means a trek to the epic Fyrish Monument, where one player wins a great power; alliances are tested at the roundtable.

While the temperature rises between the Traitors, a strategic murder shakes the castle; alliances are tested and a heated conversation makes for a simmering roundtable; one player has an impossible decision to make.

While a new alliance is tested, suspicions force an old one into the spotlight; the mission puts the Traitors under pressure and one player receives some unwanted attention; the creepiest murder yet is about to be sprung on one of the Faithful.

With a place in the final at stake, emotions run high as friendships are tested to their limits.

Doubt and paranoia run through the castle as attempts are made to sway players’ allegiances.

Host Andy Cohen talks with the Season 4 cast of "The Traitors" about their time in the castle.