user: Question: What was the air date when the team guest captain was John Bishop?
Columns: ['Episode', 'Air Date', 'Team Swash', 'Team guest captain', 'Team Coxy']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1.0, '10 January 2010', 'Joe Swash', 'Christopher Biggins', 'Sara Cox']
SQL:

assistant: SELECT "Air Date" FROM "Table" WHERE "Team guest captain" = 'John Bishop';