Fair City's Tessa gets the fright of her life on Wednesday's episode when she is greeted by a familiar face in her kitchen.
Tessa is bewildered when Alex tells her he met the prospective buyer for the apartment and rings the estate agent to find out what's going on.
"So you're saying there were no viewings this morning?", she asks them. "There must be some confusion because my old tenant dropped in and he said there was someone here, Mark Murphy?
"Well someone from your office must have let him in, can you find out who else has a key", she demands before hanging up the phone.
Tessa walks into the kitchen and is rummaging through her bag when Ciarán appears from behind the door.
"Hi Tessa," he says, as she swings around and looks at him in shock.
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.