This first episode looks at Florence Nightingale, Alexander Graham Bell, Harriet Tubman, Isambard Kingdom Brunel, and Mary Anning. The programme looks at how Florence Nightingale revolutionised nursing for ever. It shows how Alexander Graham Bell invented the telephone and follows Harriet Tubman as she frees slaves. It also looks at how Isambard Kingdom Brunel tunnelled through Box Hill to build the Great Western Railway, and watches Mary Anning discover the first Ichthyosaur fossil. (R)