America's top lawyer drama series, Suits, is currently at the height of filming in Toronto, Canada for Season 4, according to reports.

According to cast rumors, Neal McDonough is set to reprise his role as a Sean Cahill in Suits Season 4, and show developments will lead him to discover wrongdoings at Pearson Specter.

Now that it's only a few weeks before the premiere of Episode 1 One-Two-Three Go, executive producer Aaron Krosh has decided to give fans tidbits of information to whet their appetites.

On his Twitter account, Krosh gave hint about Louis and his engagement with Sheila. The Suits show-runner revealed that Louis' character bears more weight in the upcoming season: "Just watched director's cut of 402, Louis has an emotional, humorous and important story."

In Season 3, Louis almost found out Mike's great secret of not really attending any law school. The quest for that continues in Season 4 and there will be more instances where Mike will try to conceal his Harvard scandal to protect his reputation.

Meanwhile, Harvey and Mike's bumpy relationship is expected to escalate in the next season. When asked if Mike can still practice law, Krosh would only provide a "maybe answer", leaving fans to speculate.

Neal McDonough (Band of Brothers) has been cast in a recurring role as Sean Cahill, a SEC investigator, for Season 4. His character will be working alongside Eric Woodall to uncover malicious activities at Pearson Specter.

Cahill is described as the "bulldog" on the show, and he is expected to develop conflicts with other characters.

Suits Season 4 is back in USA on June 11, 9/8c.