Tom Holland and Iszi Lawrence explore the stories revealed by history's lines and linkages to uncover connections and compelling stories.

This week - power lines. Tom makes a beeline for the Science Museum to find the first ever transatlantic telegraph cable, and discovers a recording of a Paul Robeson concert marking a historic moment in telecommunications.

Iszi goes pylon spotting and hears about a pioneer who helped found the Electrical Association for Women.

Producer: Craig Templeton-Smith