A second member of the iconic Star Trek cast has signed up to join Heroes.

Nichelle Nichols, who played Lieutenant Uhara in the legendary sci-fi programme, will take on the role of new hero Monica's (Dana Davis) grandmother Nana in the superhero drama.

George Takei, who also appeared in Star Trek as Mr Sulu, starred in the first season as Hiro's father Kaito Nakamura.