Michaela Strachan highlights the plight of endangered animals across the UK. Myleene Klass tracks down the UK's biggest spider in Suffolk, Dennis Taylor looks for pine martens in the Forest of Fermanagh, Shobna Gulati searches for a rare brown bird called a twite and Brian Blessed hears how an RAF bombing range has provided an unlikely sanctuary for grey seals.

Tom Conti searches for a sea eagle on the Isle of Mull, Sean Hughes goes looking for otters in London, Cheryl Baker tries to find hazel dormice in Kent and Toyah Wilcox helps with a salmon release.

Welsh rapper Maggot goes looking for leatherback turtles, former SAS soldier Chris Ryan hunts for adders in Northumberland, and Josie d'Arby visits a house in the Cotswold to spot some bats.

Sean Hughes climbs to the top of Battersea Power Station to spot peregrine falcons, Tom Conti is on the trail of the elusive Scottish wild cat, Cheryl Baker looks for butterflies on the Sussex Downs and Brian Blessed gets very excited about great crested newts.

Michaela Strachan enlists the help of four celebrities to highlight the plight of threatened wildlife in the UK. With Dick Strawbridge, Maggot, Dennis Taylor and Rory McGrath.