'Suits' season 6 spoilers: Gallo sets his vindictive eyes on Rachel to get back at Harvey and Mike?

An unexpected twist was revealed in the season 6 premiere of "Suits," and it looks like that could set the tone for the rest of the season.

Apparently, Mike Ross' (Patrick J. Adams) prison cellmate Frank Gallo (Paul Schulze) was a victim of Harvey's (Gabriel Macht) legal prowess. He has spent a long time in prison, but it seems he hasn't let go of his beef with Mr. Specter. Now Harvey is caught at a crossroads since Rachel (Meghan Markle) wants him to help Mike, but Mike wants to fight his own battles in prison.

The second episode in the current series titled "Accounts Payable" proved that prison life doesn't really suit Mike well, especially after Frank almost stabbed him to death. Fortunately for Mike, he was saved by prison guards in time, and even if Harvey vowed to have Frank transferred to another facility, Mike's tenure at the penitentiary is still in a precarious situation.

Elsewhere, the second episode showed Pearson Specter Litt slowly rising up from the slump. However, just as they were about to settle the lawsuit, someone from Harvey's past came back to demand something precious to the hard-edged lawyer – a painting made by his mom. Again, Harvey had to do the ultimate sacrifice and parted ways with his mom's memory just to save PSL.

In the upcoming third episode titled "Back on the Map," Mike would try his hardest to keep a safe distance from Frank, but it wouldn't be easy. Check out the promo teaser below.

In an interview with The Hollywood Reporter, Schulze said, "The fact that Mike Ross is here just reminds [Gallo] of just how much he hates Harvey and he's very excited at the chance to hurt Harvey back."

"Harvey is the tip of the pyramid and when he's done with him, he'll deal with everyone else [in the prosecution team]. Cut off the head first, you know?" he added. As the video shows, it looks like he will turn to Rachel to hit Mike and Harvey where it matters most.

Would Frank turn to Rachel to get back at Mike and Harvey? Tune in to "Suits" season 6 episode 3 titled "Back on the Map" to find out. It will air on Wednesday, July 27 at 9 p.m. EST on USA Network.