Songs Used in the Episode:
No Surprises original by Radiohead

No Surprises – Ramin Djawadi

No Surprises (Stride Piano) – Ramin Djawadi

Original by Radiohead
Related Covers:

No Surprises – Notes from the Edge
The Westworld Main Title Theme is also available for purchase:

Main Title Theme – Westworld
Purchase Westworld: Season 1 (Music from the HBO® Series) (34 song album):