The drama stars Gillian Anderson as Detective Superintendent Stella Gibson who starts the second series hot on the trail of serial murderer Paul Spector (Jamie Dornan).
Written by Allan Cubitt (The Hanging Gale, The Boys Are Back, Prime Suspect 2), the first series was lauded by critics in the UK and abroad and was the channel’s biggest drama launch in a decade.
Morgan will join the cast for the show’s final three episodes as DS Tom Anderson, an officer involved in the hunt for Spector.
The actor said: “I’m delighted to be joining the cast of The Fall for what is going to be an exciting and gripping second series. Allan Cubitt has written exceptional material and I feel very privileged to be working with him and the very talented cast.”