Game of Thrones

Game of Thrones is an American fantasy drama television series created for HBO by David Benioff and D. B. Weiss as showrunners and main writers. It is an adaptation of A Song of Ice and Fire, George R. R. Martin's series of fantasy novels, the first of which is titled A Game of Thrones.Sheldon, Leonard, Howard, and Raj are all fans of the show.

In The Russian Rocket Reaction", Leonard and Sheldon drool over a sword from Game of Thrones. They decide to start a fantasy sword collection together and haggle Stuart down to $210 from $250.

In The Comic Book Store Regeneration.", when Raj and Leonard are debating whether to meet who they think is Nathan Filion, Raj mentions that they met the actor who played Jon Snow(Kit Harington), and he was a jerk, but they still watch Game of Thrones. Leonard points out that the reason Harington was a jerk was because Raj rear-ended him.

Trivia

 * The sword that Leonard and Sheldon buy in the Russian Rocket Reaction can be seen hanging in the apartment in many episodes afterwards by the door, hanging on a plague that says "Winter is Coming", a popular catchphrase from the show.