Watch Men in Black 3 (2012) HD Full Movie Free on SolarMovie. Watch Men in Black 3 (2012) online free. Agent J travels in time to M.I.B.'s early days in 1969 to stop an alien from assassinating his frien...Agent J travels in time to M.I.B.'s early days in 1969 to stop an alien from assassinating his friend Agent K and changing history.