RTE Fair City viewers were all left saying the same thing after a Carraigstown favourite was shot after a heated exchange. On tonight's episode, Damien and his younger brother Mark went head-to-head as Gwen thinks she's finally free of Tyler. 3 The hostage situation in McCoy's continued on tonight's episode Credit: RTE 3 Damien tried to calm his brother down, but tensions only rose 3 Mairead was shot during Dean and Mark's scuffle for the gun Credit: RTE Damien tried to talk down an erratic Mark, who was spooked when there was a knock at the door of McCoy's. Still chasing her hunch about Mark's innocence, Fidelma questioned the veracity of Tyler’s claims. Questioning Tyler further, Buckley and Fidelma were concerned when he revealed that Mark threatened him. More assured in her suspicions of Mark, Fidelma phoned Damien in her pursuit and discovered the hostage situation. Answering the phone, a quick-thinking Damien surreptitiously alerted Fidelma that they’re in McCoys. When Mark discovered Damien’s phone, he went ballistic at his brother, who desperately tried to calm him down. In an attempt to quell the escalating situation, Dean tackled Mark to get the gun, but a shot rang out. At the same time, Fidelma and Buckley arrived at McCoy's to arrest Mark. Amidst the madness, everyone was shocked to discover that Mairead had been shot by the stray bullet. Racing into action, Elaine provided CPR to a deteriorating Mairead while they waited for an ambulance. A look at tonight's episode of Fair City Meanwhile, Tommy prevented an emotional Dean from expressing his feelings for an ailing Mairead. Shocked by Mairead's injuries, Mark attempted to apologise to his brother, but Damien rejected the apology. On tenterhooks, Dean and Damien comforted each other while a critically injured Mairead was rushed to hospital. SHOCK SHOOTING RTE Fair City viewers raced to social media to express their shock at Mairead's injuries. One viewer remarked: "That’s on your hands Deano." Ciara gushed: "My bad... poor Mairead." Sinead tweeted: "Oh jaysus they just left poor Mairead there. This will finish Damo off." MOURNING MAIREAD Another viewer added: "Oh my gawd, Please don’t let it be Mairead... great actress." Elsewhere on the show, Carol was puzzled when she knocked at McCoy's and received no answer. While a cocky Pete informed Paul that he had severed business ties with J.J. for good. Later, Carol, Paul, Pete and Ray were concerned by the severe Garda presence at McCoy's. TYLER'S ARREST And Pete was thrown when Ray informed him that J.J. had sent another "friend" to the garage. While the gang reeled from the revelation of Mairead’s injury, Pete was left reeling from his attempt to break free from J.J., which only pulled him in deeper. Elsewhere in Carraigstown, Gwen and James were delighted at the prospect of a Tyler-free world. However James' joy was short lived as he received short shrift from Joan for his prank with Dolores. While Emma found Joan preparing to go on a romantic mini-break without Rafferty and decided to intervene. Upon learning this, Rafferty called for a meeting to address Joan's problem. After Emma urged Rafferty to save his relationship with Joan, he decided to make a meaningful gesture by prioritising her over his work. Not wanting to scupper the Marketplace deal, Joan agreed to play along with James’s lie for the time being. Finally, James was unsettled when Gwen broke the news of Mark’s confession.