This is the cheapest I could find all 3 together for under £40. Most of the other 1 & 2 seasons for less than £20 have expired and are now over £40 for only 2 seasons. Season 3 alone on amazon.co.uk is £29.98
As a total eclipse casts its shadow across the globe, a genetics professor in India is led by father's disappearance to uncover a secret theory - there are people with super powers living among us. Their ultimate destiny is nothing less than saving the world!
Heroes is a serial saga about people all over the world discovering that they have superpowers and trying to deal with how this change affects their lives...