The series looking at cult sci-fi recalls Adam Adamant, an unwitting Edwardian time-traveller thwarting baddies while getting to grips with 1960s London. Frozen in a block of ice beneath Piccadilly by his arch enemy, Adamant is disinterred by a workman digging up the road sixty years later. The programme reveals why the leading actor broke down in tears on the first day of filming, and how ITV's The Avengers both inspired and finally saw off its rival.