Gillian reports on the return of giant blue-finned tuna to Cornwall, Gannets take a leap of faith in Yorkshire, and Iolo joins leaping salmon in Wales.

Chris Packham, Michaela Strachan, Gillian Burke and Iolo Williams focus on the incredible journeys wildlife makes in autumn whether feather, fin or fur.

The team look at the unseen side of autumn. There is big news about hedgehogs and a look at one of the cutest and strangest marine predators – the bob-tailed squid.

Gillian reveals the surprising wildlife to be found amongst the chimney stacks and industrial ponds of South Yorkshire.

Autumnwatch is inspired by Halloween. Gillian shows off the amazing hydraulic power of spiders' legs. Iolo has an exclusive update on the remarkable story of a giant vulture.

Chris catches up with a mob of hungry teenage white-tailed eagles, released on the Isle of Wight.

Chris Packham, Michaela Strachan, Gillian Burke and Iolo Williams are live from the New Forest, Fife, Yorkshire and Powys. There is more drama from Michaela's Scottish seal colony.

Chris is in the New Forest watching autumn transform his home, and Iolo is at the spectacular Centre of Alternative Technology in west Wales.