ตอนที่กำกับโดย Skipp Sudduth ซีรีส์คือหมายเลขอะไร
What's the series number of the episode directed by Skipp Sudduth?
df = pd.DataFrame(columns=['no_in_series', 'directed_by'])
df[df['directed_by'] == 'Skipp Sudduth']['no_in_series']