: Activist Matthew Collins (played by Stephen Graham) focuses on keeping the informant, Robbie Mullen , safe until the trial begins. However, this dedication inadvertently places Matthew’s own family in danger.
: Matthew and his wife, Alison, take Robbie into their home. The episode highlights the stark differences in their lives, with Matthew realizing the "empty" and "remarkably ignorant" life Robbie has led. The Walk-In Season 1 - Episode 4
In Season 1, Episode 4 of The Walk-In , the tension escalates as a trial date is set for the members of the far-right group . Plot Overview : Activist Matthew Collins (played by Stephen Graham)