Another Traitor found themselves in serious trouble as The Traitors Ireland returned to Slane Castle, while a chaotic encounter with some decidedly uncooperative sheep offered a brief break from the tension.

By the end of the night, the Faithfuls had reason to celebrate, but Siobhán McSweeney still had one more twist in store.

Here are six key moments from episode four.

***Warning: Spoilers for The Traitors Ireland episode four below***

Saoirse’s murder puts Aoife under scrutiny

Breakfast brought confirmation that Saoirse had become the Traitors’ latest murder victim.

Almost immediately, attention turned to Aoife.

Several players questioned why she appeared less upset by Saoirse’s departure than she had been following Seán A’s banishment the previous night.

The issue followed her to the Round Table, where DJ floated a theory that Aoife could have been recruited as a Traitor and then deliberately murdered someone close to her, believing nobody would expect it.

Carla also admitted the contrast in Aoife’s reactions had stood out to her.

Aoife pushed back, questioning what sort of response people expected after she had known Saoirse for only a few days.

She also made a fair point: if she were a Traitor, why murder someone who trusted her?

Donal remains in the frame

The intense scrutiny Donal faced in the previous episode eased somewhat, but suspicions around the Leitrim teacher have not gone away.

Diego told Denis that he believed Donal could be a Traitor, with Denis agreeing that he still had questions about him.

Aoife also admitted at the Round Table that she remained “fixated” on Donal, although she struggled to put her finger on exactly what was bothering her.

This time, however, the room did not follow.

As the vote swung heavily in another direction, Aoife stuck with her instincts and wrote down Donal’s name.

For now, he remains firmly in the mix.

Sheep, shields and a row over immunity

The day’s mission tested the players’ communication and observation skills as they tried to identify individual sheep from descriptions of their markings.

It sounded straightforward.

It wasn’t.

References to Dalmatians, zebras, spots and stripes flew around the field as the players discovered just how difficult it is to distinguish one sheep from another at speed.

They eventually added €2,000 to the prize pot, taking the total to €12,900, before being offered the chance to compete for a shield.

That was when things became less playful.

With Fionula already under suspicion, Denis objected to her getting a chance to compete for immunity, arguing that one of the main names likely to come up for banishment should not be able to make herself safe.

Fionula later confronted him.

She said she could accept Denis believing she was a Traitor, but questioned “who made you the lord and master” when it came to deciding whether she should be allowed to play for the shield.

David ultimately won immunity and was delighted to do so, having gone into breakfast convinced he was “a goner”.

The case against Fionula builds

By the time the players returned to the castle, Fionula’s name was being discussed in several different conversations.

Seán C had built an extensive case against her, while Sam had also been quietly watching her.

Fionula challenged Sam over his behaviour following the coffin mission, only for him to reveal that she had been high on his own list of suspects from the start.

Sam said he preferred to hold his questions until the Round Table, hoping to “catch you on the hop” rather than give a suspected Traitor time to prepare.

Not everybody was convinced.

Gráinne felt much of what others were reading as suspicious was simply Fionula’s personality, while Aoife remained adamant that she did not believe she was a Traitor.

But the pressure was clearly building.

Fionula’s game unravels

Fionula tried to turn the spotlight onto Sam at the Round Table, but the questions kept coming back in her direction.

Sam challenged her behaviour after the Traitors were first selected and following Seán A’s banishment.

Anna questioned her body language, while Denis said sitting beside her at previous Round Tables had made him notice how tense she appeared.

Ian then focused on her voting record.

Fionula had previously said she was convinced Seán A was a Faithful and had repeatedly raised DJ as a suspect, yet ultimately voted to banish Seán.

When Fionula suggested she might be being used by the Traitors, Janet pressed her to explain exactly how.

The argument failed to shift the room.

Even Carla and Páraic K voted for their fellow Traitor once it became clear she was unlikely to survive the vote.

After receiving the most votes, Fionula stood before the group and revealed that she had been a Traitor from the moment Siobhán placed her hand on her shoulder on the opening night.

The Faithfuls erupted.

They have now caught two Traitors in three Round Tables.

Six players are sent to death row

Back in the Conclave, Carla and Páraic K were left to process the loss of one of their own.

“I feel like a b****,” Páraic admitted.

Carla believed Fionula understood why they had voted against her and noted that she had left without firing a parting shot in their direction.

Then Siobhán arrived with another twist.

There would be no murder that night.

Instead, Carla and Páraic were ordered to place three pairs, six players in total, on “death row”.

At the next mission, the group will have a chance to save one pair before one of the remaining four is murdered.

Páraic immediately considered putting himself in danger as part of an elaborate bluff.

Or, as he put it: “Bluff, bluff, double bluff, double bluff.”

With another Traitor gone and the Faithfuls gaining ground, the remaining pair may need every trick they have.