user: Question: What was the series number for the episode "I Forgot to Remember to Forget"?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code', 'U.S. viewers (millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [89.0, 1.0, '" 4 Years, 6 Months, 2 Days "', 'Greg Prange', 'Mark Schwahn', 'January8,2008', '3T6801', '3.36']
SQL:

assistant: SELECT "No. in series" FROM "Table" WHERE "Title" = '"I Forgot to Remember to Forget"';