Following the conclusion of Series 14, this series marked the start of Top Gear focusing on its sustained popularity with younger audiences and embracing its superstardom, with A-List celebrity guests making their appearances on the show such as Tom Cruise, Cameron Diaz and Rupert Grint.
Viewing figures were highly inconsistent for this series, with 6.25 million viewers tuning in on average each week, approximately 440,000 less than the previous series and 920,000 less than Series 13. 2.9 million viewers set apart the least watched episode, Episode 3, and the most watched episode, Episode 5, at 4.58 million and 7.48 million viewers respectively. It was the latter of these episodes, alongside Episode 4, which fans would enjoy the most, rating both an 8.3/10 on IMDb. As strong interest in the show clearly remained, Top Gear continued in December 2010 with two specials, before a regular series of six episodes ensued in the new year.
|1 (119)||James attempts to conquer an active volcano in a Hilux, Jeremy risks his life driving in a Reliant Robin, and Richard waves goodbye to the Lacetti and welcome in the new reasonably priced car.||Bentley Continental Supersports (Jeremy)||Misc.|
|2 (120)||The presenters are each given a budget of £5000 to buy a four door saloon that can be used as a track day car testing their machines in Europe's capital of speed: Germany.||Porsche 911 Sport Classic, Porsche Boxster Spyder (James)||Alastair Campbell|
|3 (121)||The presenters set out to test three of the newest four door supercars to see which is the best for a business man interns of speed and chauffeuring.||Chevrolet Camaro SS vs Mercedes E63 AMG (Richard)||Rubens Barichello (Liana), Rupert Grint (Cee'd)|
|4 (122)||The presenters each build a motorhome and then set off for a camping holiday in an attempt to prove which machine is the best.||Audi R8 V10 Spyder vs Porsche 911 Turbo Cabriolet (Jeremy)||Andy García|
|5 (123)||Richard races a custom-built VW Touareg against some snowmobilers in Sweden, James attempts to break a world record in the new Bugatti Veyron Supersport, and Jeremy pays tribute to the motoring legend Ayrton Senna.||None||Cameron Diaz, Tom Cruise|
|6 (124)||The team set out to prove that the hatchback did not deserve to kill off the British sports cars by purchasing three of the classics and then setting off for a trip down memory lane.||Ferrari 458 Italia (Jeremy)||Jeff Goldblum|
Spurred on from its hugely successful 13th series and similarly acclaimed 14th series, Series 15 saw the trio begin to be recognised as international superstars rather than measly television presenters. This became abundantly clear when a British couple spotted them on the motorway in May of 2010, during the filming for their homemade motorhomes segment. This amateur footage was later reused in official promotional material for the series, included below.
The second series to be filmed in 1080i High Definition, Series 15 saw a few changes as the first series of its respective decade, one of the main ones being the change of reasonably-priced car from Chevrolet Lacetti to Kia Cee'd, which was marked by having the former destroyed under a felled chimney.