Assuming these episodes are meant to follow each other in a chronological order, that is, the producers are suggesting that Don Mackay went "missing" before the Great Bookie Robbery, historically, this does not work out. The Robbery occurred back on Wednesday, the 21 April 1976. This was fifteen months before Donald Mackay was murdered, and in fact, neither Mr. Rent-a-Kill Flannery nor Aussie Bob were involved in that blag.