Ruby refuses to apologise to Garda Knowles in Tuesday's Fair City on RTÉ One and the RTÉ Player.
On Sunday, Ruby's friend Lorcan reignited his feud with Garda Knowles by filming and mocking him online.
In Tuesday's episode, Ruby crosses paths with Knowles.
"She (Ruby's mother Babs) said you'd something to say to me," says Knowles.
"Nope," Ruby replies.
"About your part in making the video," Knowles continues.
"If you're expecting an apology, forget it," says Ruby.
"You might regret that, young lady," warns Knowles.
Fans can find out what happens next on Tuesday on RTÉ One and the RTÉ Player at 8:00pm.
Fair City airs on RTÉ One and the RTÉ Player on Sundays, Tuesdays, Thursdays, and Fridays.
