Update: Added clip from Hurt ep below.
08/31 Out of the Past (2.17) - When Arcee is unexpectedly brought back into the company of an old friend, they discover together that Decepticon has been scheming behind their backs an elaborate plan with the intentions of destroying the Autobots and claiming his victory.
09/07 New Recruit (2.18) - Starscream goes on a quest for Red Energon; a new Autobot joins Team prime. The Autobots and Decepticons come across some clues that could have the potential to change the war and perhaps restore Cybertron.
09/14 The Human Factor (2.19) - Silas is given a new lease on life and approaches Megatron with a plan to join the Decepticon ranks.
09/21 Legacy - no episode description