Episode 4

Yn sgil y digwyddiad gyda'r gwn, mae'r tîm yn cysylltu Mel â llofruddiaethau hanesyddol Harvey.

In the wake of the school shooting, the gunman is charged with murder. Ffion is convinced Mel could have been involved in the historic murders and clashes with Rick as he tries to keep the past under wraps. Then a shocking personal confession takes them back to the time when they were lovers.

I efterdyningarna av skolskjutningen åtalas gärningsmannen för mordet på Abi. Men Ffion är övertygad om att Mel kan ha varit inblandad i de gamla morden och hamnar i konflikt med Rick.