In 'Marvel's Agents of S.H.I.E.L.D.' Season 2 Episode 19 titled 'The Dirty Half Dozen,' fans will see 'Stand and Deliver' actor Edward James Olmos returning to the show to reprise the role of Robert Gonzales. In addition, the upcoming episode will show Gonzales and Coulson teaming up to fight Hydra.

According to Kdramastars, the official synopsis of Marvel's Agents of S.H.I.E.L.D.' Season 2 Episode 19 released by ABC states "Enemies must come together."

The synopsis of 'The Dirty Half Dozen,' which will air on Tuesday, April 28, further states, "Gonzales and Coulson must find a way to put their differences aside and work together against Hydra, even if it means teaming up with someone they don't trust."

Meanwhile, a report in IB Times states after surrendering to Bobbi (Adrianne Palicki) and Mack (Henry Simmons) in episode 18, Coulson will be seen locked up. Gonzales imprisons him in a holding cell, and he asks, "Why turn yourself in now, Phil?"

In response, Coulson says that he has a man inside Hydra, who revealed that they're experimenting on people with powers in the Arctic. While Coulson wants to go after them, Gonzales says he can't trust the former director.

"Then trust the mission, but don't let this be about you and me," Coulson says, "The one thing we still have, both of us, is stopping Hyrda, don't we?"

Apart from the series regulars and Olmos, the upcoming episode of 'Marvel's Agents of S.H.I.E.L.D.' will guest star Henry Simmons as Alphonso "Mack" Mackenzie, Ruth Negga in the role of Raina, Henry Goodman as Dr. List, Mark Allan Stewart as Agent Oliver, J. August Richards in the role of Deathlok/Mike Peterson, Kyle Maclachlan as Cal, Jamie Harris as Gordon, Christine Adams as Agent Weaver, Maya Stojan as Kara/ Agent 33, Dichen Lachman as Jiaying, Luke Mitchell as Lincoln Campbell and Chad Cleven as Hydra agent.

'Marvel's Agents of S.H.I.E.L.D.,' airs at 9.00 pm ET on Tuesday, April 28 on ABC.