Watch Captain America: The First Avenger (2011) HD Full Movie Free on SolarMovie. Watch Captain America: The First Avenger (2011) online free. Steve Rogers, a rejected military soldier, transforms into Captain America after taking a dose of a ...Steve Rogers, a rejected military soldier, transforms into Captain America after taking a dose of a "Super-Soldier serum". But being Captain America comes at a price as he attempts to take down a warmonger and a terrorist organization.