Game of Thrones

The character Joffrey Baratheon is modeled after the Roman emperor Caligula who was reputed to be extremely cruel and sadistic during his four-year reign.

A replica of Gandalf's sword, Glamdring, from 'The Lord of the Rings' trilogy and 'Hobbit' trilogy, is forged inside the Iron Throne.

Daenerys had purple eyes in the books, but the contact lenses Emilia Clarke wore affected her performance so they were abandoned.