Fifth Gear Season 17 Episode 1 (Fifth Gear s17e01) airs on Thursday, June 3rd 2010 at 07:30 pm via five (UK).
Here is summary for Fifth Gear Season 17 Episode 1 :

Tiff and also Vicki test drive some of the latest hatches. Meanwhile, Jason gets to drive a Ferrari 458 Italia whilst Jonny finds himself taking place in a city car challenge.

Few hours after original series aired on TV, online streaming video for usually available on Net and of course, if video available, as soon as possible will show you where you can watch this episode for free.