Fair City ratchets up the tension in Wednesday night's episode as the hostage situation involving Ciarán, Katy and Tessa continues apace.

Coming up on the soap, Ciarán is playing a deathly game with the pair and they're horrified.

Katy desperately tries to get Tessa on board with a plan to escape his clutches by using her son Fionn to persuade her.

"You're not going to kill me, fine, I'll kill you and your kid becomes an orphan", Katy tells her.

"No", a crying Tessa pleads.

"Think about that, think about Fionn. You could do it couldn't you?", Katy insists.

Tessa shakes her head in distress.

"Yes," Katy continues. "Not for yourself, for Fionn. You would wouldn't you?"

"Yes," Tessa finally agrees in a whisper.

"Louder," Katy demands, before Tessa shouts "Yes!"

"Good," Katy responds.

Fans can find out what happens next on Wednesday on RTÉ One at 8:00pm.

Fair City airs on RTÉ One on Sundays and Tuesdays to Thursdays.

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Catch up on Fair City on the RTÉ Player.