Ward's past and connection to Garrett is revealed on Agents of S.H.I.E.L.D. Season 1 Episode 21.
The question remains whether or not Ward will turn on his former teammates or not to further Garrett's HYDRA mission.
Coulson and May go undercover at a Cybertek facility in order to try and infiltrate their computer system and from there into HYDRA's. The mission doesn't go as planned, but they find out some crucial information about the Deathlok program.
At the end of the hour, the lives of Coulson's team will be on the line. Will they be defeated?