Paddy and Marlon resumed their friendship but kept it a secret from Laurel and Rhona. Eventually the two couples reconciled completely and have stayed on good terms. In October 2013, he is attacked by serial killer Cameron Murray (Dominic Power) and is knocked out cold in the flooding Woolpack cellar. Cameron later takes people hostage but eventually lets them go except for Chas and Debbie Dingle (Charley Webb). He later escapes from the cellar and holds Cameron at gunpoint while Chas and Debbie attempt to escape. Marlon then runs to the cellar (now flooding to the top) but Cameron follows. After nearly drowning the three, Cameron is electrocuted. Marlon is put in the paper as a 2nd hero after what happened with Eli and the Bookie years back. He later tells Laurel the truth, she is angry but later forgives him. Donna dies and Marlon is awarded custody of April Windsor, his long lost daughter. He marries Laurel but is devastated when she becomes an alcoholic. After Jessie Grant arranges a surprise wedding, they marry on Christmas Day. The marriage ends when Jessie has an affair with her former husband Al Chapman. Marlon is arrested for killing Rhona's partner Graham Foster. He is later released when the real culprit, Pierce Harris, Rhona’s ex-husband, who had raped her 3 years previously is arrested and sent back to prison. Marlon suffers from PTSD for sometime after his release, which results in him suffering a heart attack. In 2021, Marlon and Rhona reconcile. He buys into the woolpack when Charity is disowned by the family after she makes a move on Al, who Debbie had discovered was cheating on her with Priya Sharma (Fiona Wade) weeks before. The business starts to experience financial issues due to the effects of the COVID-19 pandemic. Marlon suggests they start running a barbecue to get more business. Marlon buys a grill which is outside the business’s financial budget. This arrangement is short lived when Matty Barton burns his hands while cooking the barbecue food. When it is revealed that April is being bullied by her step grandfather, Bob’s daughter, Cathy, Marlon falls out with Bob and bans him from having any contact with April again. April is upset about this and spends time with Bob behind Marlon’s back. This infuriates Marlon even more and it results in an argument between him and Bob, upsetting April even more.