After a trip to the zoo, the Doctor and Martha go in search of a real life dodo, and are transported by the TARDIS to the mysterious Museum of the Last Ones. There, in the Earth section, they discover every extinct creature up to the present day - billions of them, from the tiniest insect to the big...

After a trip to the zoo, the Doctor and Martha go in search of a real life dodo, and are transported by the TARDIS to the mysterious Museum of the Last Ones. There, in the Earth section, they discover every extinct creature up to the present day - billions of them, from the tiniest insect to the biggest dinosaur, all still alive and in suspended animation.

Preservation is the Museum's only job - collecting the last of every endangered species from all over the universe. And for millennia the Museum has been trying to trace one elusive specimen: the last of the Time Lords...

• Featuring the Tenth Doctor and Martha as played by David Tennant and Freema Agyeman in the acclaimed Doctor Who series from BBC Television.*