user: Question: how many episodes has been directed by Mark K. Samuels ?
Columns: ['No. in series', 'No. in season', 'Title', 'Directed by', 'Written by', 'Original air date', 'Production code']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [236.0, 1.0, '"Twisted"', 'Gerry Cohen', 'Richard Gurman', 'September 29, 1996', '11.01']
SQL:

assistant: SELECT COUNT("No. in series") FROM "Table" WHERE "Directed by" = 'Mark K. Samuels';