user: Question: what is the maximum number in the season wher the us viewers is 2.59?
Columns: ['No. in series', 'No. in season', 'Title', 'Directedby', 'Writtenby', 'Originalairdate', 'Production code', 'U.S.viewers (million)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [27.0, 1.0, '"SO"', 'Stephen Kay', 'Kurt Sutter', 'September7,2010', '3WAB01', '4.13']
SQL:

assistant: SELECT MAX("No. in season") FROM "Table" WHERE "U.S.viewers (million)" = '2.59';