There are several reasons why Westworld has piqued the attention of viewers, one of which may very well have reared its head in the most recent episode. Viewers, though, have been left enchanted by the score from Game of Thrones composer Ramin Djiwadi which has featured different spins of familiar songs.

The first episode - one of the most striking premieres in recent years - featured a haunting cover of The Rolling Stones track "Paint It Black" while the even-better second episode debuted a performance of Radiohead song "No Surprises."

An EP has been released by WaterTower Music featuring these covers, as well as the theme music taken from the HBO series which has been created by Jonathan Nolan and Lisa Joy.

Other cover versions to have featured in the sci-fi western include "A Forest" by The Cure and Soundgarden's "Black Hole Sun."

The series, which follows a theme park where guests can interact with robots known as 'hosts', is onto its sixth episode, the trailer for which seems to reveal a drastic spoiler.

Evan Rachel Wood, Jeffrey Wright, James Marsden are just three of the show's ensemble cast which also includes Ed Harris and Anthony Hopkins as the mysterious Man in Black and Westworld creator Dr Robert Ford, respectively.

Westworld episode six trailer