Jeff has carefully planned out the murder, intending to electrocute Rodger by killing him with a live radio thrown into a bathtub filled with water.
In anticipation of their stepfather Rodger's arrival, Jeff prepares a to-do list, including cleaning the house of evidence, setting up an alibi of the brothers spending the weekend in Sydney, and rehearsing the murder.
This ultimately results in Terry discovering that Jeff is in fact unemployed, and may be simply planning the murder as a means to inherit the family home and thus avoid bankruptcy.
Their argument is cut short by the unexpected early arrival of Rodger, and Terry is forced to make conversation in order to stall for time.
Rodger reveals that the reason he was so distant in the boys' childhoods was because Jeff was deeply traumatised by their father's suicide, and thought it would be best to give them some space.
However, he eventually remembers the brothers' Sydney alibi, and Jeff is forced to reveal himself and ties Rodger up before throwing him into the bathtub.
Jeff then runs away while continuing to reload, but Terry catches up and wrestles the pistol off him just as he finishes, causing the shots to go wide.