Table: tv_episode_data_39
Columns: no_in_series
no_in_season
title
directed_by
written_by
original_air_date
production_code
u_s_viewers_millions

Question: What is the number of this season's episode that had the production code 2t6206?
SQL: SELECT MIN("no_in_season") FROM tv_episode_data_39 WHERE "production_code" = '2T6206'