The episode is set in March, judging by the scene in the car when Thompson accuses Carew of being involved in the robbery. However when Regan stops at the petrol station to check his car, there is a calendar which gives the month as September.
When Regan is shown mixing a cocktail in a pitcher whilst speaking to Carter on the telephone he reaches around to the fridge for a bottle, which he sets down on the bench-top. In the next cut he is shown with a bucket of ice, which wasn't there before. Also a green bottle close to the window has been moved.
After Regan throws the bomb over the bush, there are 3 sources of explosion.