user: Question: Which episode was watched by 7.2 million viewers?
Columns: ['Episode', 'Broadcast date', 'Run time', 'Viewers (in millions)', 'Archive']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['" Episode One "', '2November1968', '24:32', '7.3', 'Only stills and/or fragments exist']
SQL:

assistant: SELECT "Episode" FROM "Table" WHERE "Viewers (in millions)" = '7.2';