user: Question: List the production code for the episode had 5.55 million viewers?
Columns: ['Episode #', 'Production Count', 'Original Airdate', 'Prod. Code', 'Title', 'Viewing Figures millions']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [1.0, 14.0, '7 June 2002', 'ICEB783X', '"Baby Talk"', '5.94']
SQL:

assistant: SELECT "Prod. Code" FROM "Table" WHERE "Viewing Figures millions" = '5.55';