Black Widow decides to trust and help Captain America track down the instigator of the Avengers' fight in Captain America: Civil War, despite initially siding with Tony Stark. Iron Man chalks her up to be a traitor, coldly telling her that it must be difficult to let go of her double-agent ways. (Ouch.) Since Thaddeus Ross knows about her involvement, she's now on the lam and possibly helping Captain America.