Shak has a confession to make, but it puts Heston in a difficult situation. Zara is furious when Tom interrogates her and it seems Joe is about to bring more trouble home. Ayesha tries to get through to a friend with a dangerous hobby. She makes no bones about how risky it is, but will they give it up?

Sid returns from holiday to find his recent PR exercise has horribly backfired. Zara and Daniel face their worst nightmare when they discover Joe has gone missing from school. Heston discovers a patient with Parkinson's disease is making impulsive life choices. Could it be a side effect of what he prescribed?