Table: doctor_who_audios
Columns: story
title
doctor
narrator
format
release_date

Question: Which Doctor is featured in City of Death?
SQL: SELECT "doctor" FROM doctor_who_audios WHERE "title" = 'city of death'

Question: Available in 2-CD format, what is the title of story number 026?
SQL: SELECT "title" FROM doctor_who_audios WHERE "format" = '2-cd' AND "story" = '026'