Revealing mistake: When they break the door to the nurses room down because it's locked, you can see the lock is retracted so there was no need to break the door down. (00:05:10)
Revealing mistake: The doctor closes the blinds on the ward and picks his phone up and makes a call. However, you can see the screen never comes on so how could he choose a contact to ring?
Continuity mistake: When JP is talking to Marlon who is having lunch, Marlon's napkin keeps alternating between blowing in the wind and hanging freely.
Continuity mistake: JP and Rosie go from having twins in episode 10.3, to having only a daughter in 10.8.
Answer: Most likely they had only tropical exotic drinks, he wanted an old fashioned English beer.