Street Justice - Season 2 Episode 10 Remember Me
Overview: When Miguel saves an old man from being beaten to death, Adam is shocked to realise it's his former foster father. He hasn't seen Joe or Catherine Johnson since he was ten years old and he was taken away from them. Unfortunately, Joe is in the throes of Alzheimer's, and is unable to help Adam learn about is past, and also unable to help capture the men who beat him.