user: Question: Which Episode has a Rank of 1?
Columns: ['Rank', 'Show', 'Episode', 'Number of Viewers', 'Date']
Types: ['real', 'text', 'text', 'real', 'text']
Sample row: [1.0, 'Dynamo: Magician Impossible', '2.01', 1927000.0, '5 July 2012']
SQL:

assistant: SELECT "Episode" FROM "Table" WHERE "Rank" = 1.0;