Rafferty tells Emma and James that he will "defang" Joan in Thursday's Fair City on RTÉ One and the RTÉ Player.
Solicitor Joan, who is seeing Rafferty, has sided with the Marketplace tenants over the rent increases.
"This is your girlfriend's fault," says James. "You need to get her in line."
"Stop moaning and stick to the plan," Rafferty replies. "I'll defang Joan."
During a public meeting in Thursday's episode, Rafferty then sends Joan flowers to make it look like she's colluding with him and his family, turning the crowd against her.
Fans can find out what happens next on Thursday on RTÉ One and the RTÉ Player at 8:30pm.
Fair City airs on RTÉ One and the RTÉ Player on Sundays, Tuesdays, Thursdays, and Fridays.
