Pieter's blood test reveals David has hepatitis B, so he must have a social past before age ten. Tim allows amused, friendly Robbie to visit 'funny secret' David. Their celebration ends in a hangover. Sander tells his ma he fell asleep 'innocently' at Lotte's. Herman demands Sofie returns to lab research. Maarten teaches David to use cutlery.—KGF Vissers