On SBS? It was an ill-fitting, badly-edited mish-mash of
non-episodes.  You've missed *nothing*. Mostly the truffle race
(Veyron vs Cessna) and the bits thrown in by a 4-year-old to pad out
the time between adverts.

On BBC ep 9.3 (IIRC),

Jezza wears a suit. Jezza drives a new Lambo. The lads (and The
Stig) play with some tractors on the premise of growing their own
"petrol".  Jazza "plows" the field with explosives. Train at 75 mph
demolishes Renault Espace at a level crossing. (The slo-mo is an
excellent illustration of inertia.)