user: Question: What is the original air date for episode 4? 
Columns: ['Series #', 'Season #', 'Title', 'Directed by', 'Written by', 'Original air date', 'U.S. viewers (in millions)']
Types: ['real', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: [21.0, 1.0, '"Friends Close, Enemies Closer"', 'Patrick Norris', 'Joanna Johnson', 'June28,2010', '1.83']
SQL:

assistant: SELECT "Original air date" FROM "Table" WHERE "Season #" = 4.0;