The Disappearance

Tensions rise between Luke and Henry when Anthony gets in trouble at school; Luke and Helen panic when Anthony vanishes.

After two years witnesses come forward claiming to have seen Anthony; Henry is still obsessed with the Paulownia Tomentosa leaf; Susan and Charles make a discovery in the park.

Luke and Helen search for suspects connected to Henry's former work; Helen is desperate for information about her son; Henry continues his own investigation on the side and Catherine finds a source of comfort.

As Charles and Susan continue their in-depth investigation, they focus their attention on one main suspect; Henry seeks advice from Catherine's patient as a new discovery is made in the investigation.

Luke and Helen continue to believe their son's disappearance is related to Henry's past; Henry goes to Fred for help.

The mystery behind the disappearance is almost unravelled, and a race against the clock gets underway.