BBC Four TV Guide

The team travels across Great Britain to investigate evidence that suggests the search for alien life may lie within Earth's own solar system. Off the east coast of Scotland, Chris Lintott meets Claire Cousins, who explains the fundamental conditions needed for life, while Maggie Aderin is in Milton Keynes to meet Mark Fox-Powell, whose team are recreating the freezing conditions of the icy moons of Jupiter and Saturn in the lab to understand how chemistry behaves there

Narrowboater Robbie Cumming explores the Victorian West Yorkshire village of Saltaire on the Leeds and Liverpool Canal. He also moors up in Leeds and goes in search of an abandoned waterway on the Aire and Calder Navigation

On the last leg of his epic journey across the north of England, narrowboater Robbie Cumming tackles the fast-flowing River Ouse and is forced to make an emergency stop. His destination is Ripon Basin at the outer reaches of Britain's inland waterways

Exploring the realm of the creatures to better understand how they have evolved. Travelling from the rain forests of French Guiana to the Arctic Ocean, scientists use traditional and cutting edge techniques to examine both modern insects and the fossil record in their search for a single common insect ancestor

Michael Portillo begins the final leg of his journey at the Transport Research Laboratory in Wokingham, where they have been keeping Britain's roads safe for 90 years. The presenter learns how practical research into road safety led to innovations such as seatbelts, zebra crossings and mini roundabouts