A terrified patient with a failing heart has Aaron and Laura on high alert. Chris and Sam meet their oldest ever patient. 104-year-old Nelly has terrible face injuries after a fall but still gives the boys her secret to longevity.

A sudden collapse shocks Olivia and Sally as their patient suddenly appears to be having a heart attack. Carlos and Nhi fear for their safety as a volatile woman lashes out in the back of the ambulance.