user: Question: which is the biggest number of episode in the season, where the number of the episode in series is 20?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Prod. code', 'Viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [13.0, 1.0, '"Spasticity"', 'Constantine Makris', 'Andrew Lenchewski', 'June3,2010', 'RP#201', '5.84']
SQL:

assistant: SELECT MAX("No. in season") FROM "Table" WHERE "No. in series" = 20.0;