Main Building (Cardiff University) as St. Luke's University
The Doctor tells Bill his plan to test Missy and his long history with the Master.
Source: Doctor Who — Tumblr
“World Enough and Time” Filming Locations
The Doctor decides to take Missy out for a test and Bill ends up separated from everyone else by a gulf of time.
Doctor Who episode “World Enough and Time” was filmed in Cardiff in the United Kingdom.
Bute Street (between West Circle & West Bute) as Street near Hospital
Bill continues to listen to why conversion is taking place.