All of them from Season 2 onwards are pretty entertaining but here's the best in my opinion:
Season 07 Episode 04
"- Richard takes the incredibly hot Pagani Zonda F out onto the airfield, and the Stig sets an amazing lap time with it
- A tribute to Richard Burns
- Jeremy, Richard, and James are given £10,000 each and told to go out and buy a mid-engined Italian supercar and then are given a series of challenges to compete in with them
- James races the new Renault Clio against a bicycle
- Star In A Reasonably Priced Car: Ellen McArthur"
Season 6 Episode 6
"- Jeremy races Richard and James from London to Oslo, Norway. Jeremy goes in a Mercedes-Benz McLaren SLR, James and Richard go via water.
- In the news: The new Nissan Micra C+C, new road maps, new Mercedes-Benz S Class, and the stunning Alfa Romeo Brera in the studio
- The £170,000 Aston Martin DBR9 in the studio and the Stig taking it around the test track"
Season 12 Episode 8 [Vietnam Special]
The boys attempt to cover 1000 miles of Vietnam in 8 days on motorcycles. This is probably one of the best episodes of them all which is ironic considering it doesn't involve cars.
Season 13 Episode 6
Jeremy tests the Nissan 370Z GT and BMW Z4 sDrive35i followed by The Stig taking them for a lap. In the main event the boys are given £3000 to buy pre-1982 cars and race them in a Classic Time Trial Rally. Brian Johnson, the lead singer for AC/DC, is the Star In a Reasonably Priced Car.
Season 10: Any episode
Most of Season 10 is standout quality. Botswana Special and Polar Challenge, if you can get it, are highlights.