user: Question: What is the maximum number in the series for the episode directed by Harvey S. Laidman?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date']
Types: ['real', 'real', 'text', 'text', 'text', 'text']
Sample row: [159.0, 1.0, '"Critical Condition (Part 3)"', 'Jeannot Szwarc', 'Charles Holland', 'September 24, 2002']
SQL:

assistant: SELECT MAX("No. in series") FROM "Table" WHERE "Directed by" = 'Harvey S. Laidman';