user: Question: Which series airs Saturday on Channel 5?
Columns: ['Series', 'Monday', 'Tuesday', 'Thursday', 'Saturday']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Celebrity Big Brother 8', 'Channel 5', '5*', 'Channel 5', '5*']
SQL:

assistant: SELECT "Series" FROM "Table" WHERE "Saturday" = 'Channel 5';