user: Question: what are all the actor where first episode is "Ambush"
Columns: ['Character', 'Fate', 'Actor', 'First Episode', 'Final Episode', 'Duration', 'Final Episode Count']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['Rick Stetler', 'Arrested', 'David Lee Smith', '"Blood Brothers"', '"Time Bomb"', '02x01–08x23', 34.0]
SQL:

assistant: SELECT "Actor" FROM "Table" WHERE "First Episode" = '"Ambush"';