S3 E1 ‘The Deep End’ – S5 E45 ‘On the Inside’
NB. Alex does not appear between S4 E46 ‘Pawns in the Game – S5 E19 ‘A Kind of Living’
Cardio-Thoracic Surgical Registrar
Sandy : Excuse me do you know they way to the cardio-thoracic ward?
Alex : Are you our new Darwin nurse?
Sandy : Yeah
Alex : Follow me