Red Green is a Time Lord
The Possum Lodge is his TARDIS, though his backup TARDIS is the Possum Van, and the duct tape he always has on hand is his sonic screwdrivers. Harold doesn't forget to be awesome
After the series ended, Harold and Bonnie moved to America, where they had two sons. John and Hank inherited their parents' geekiness in general, and their father's passion for video in particular. As for why the brothers are seemingly too old for this to work, something something Time Lord.