Matthew, the man Marcella had known as a teen, had been killed by Jack.

Does Henry kill Matthew in Marcella?

The shock scenes saw Henry Gibson revealed as the culprit, after he took best friend Matthew Neil hostage in his wine cellar, in an attempt to frame him for his crimes. After Marcella arrived at Henry's house to find he had also stabbed her husband Jason, he admitted to the killings.

Who was Matthew in Marcella Season 3?

Who does Glen Wallace play in Marcella? Viewers first met Glen's character Matthew in episode two of Marcella, when he unexpectedly catches Marcella/Keira off guard.