Top Gear does not give up easily. Unless it's too difficult, then sometimes we do. But when it comes to building amphibious cars we weren't going to be beaten.

Our previous attempt ended in ignominy, near drowning and the feeble sight of James's rubbish water-tortoise Herald technically crossing the line first, but that wasn't going to put us off.

So, each presenter had to build a refined version of their original aquatic masterpiece and then embark on one of our most ambitious challenges yet. If we tell you that it begins in Dover, you might get a sense of how big this is...

Check back every day this week for more previews and video. The new series starts on Sunday October 7 at 8pm on BBC Two.

Check out our exclusive TGTV previews:

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