This episode focuses on the family bonds that carry people through tough times. Mohammed, who's 64, has been hit by a pizza delivery motorbike. Consultant Will is concerned that he may have a pelvic fracture, which could seriously affect his mobility and, if it hits a major artery, can be life threatening. His son Tom reflects: 'When you are younger you think your dad is superhuman. When this happens, you realise he isn't invincible...' Ninety-year-old John comes to St George's with his wife Iris and daughter Joan after his GP picked up on his abnormally low heart rate.