The biggest moment in "Suits" has been Mike Ross' arrest, and viewers were tying the pieces together on who had possibly turned him in. There were many suspects on the list — most of them are with ulterior motives, except for one.

In the second episode of the show's midseason 5, the answer to the big question of who sold Mike out was revealed. It was Louis Litt's (Rick Hoffman) ex-girlfriend, Sheila Sazs (Rachael Harris), which came as a bit of a shock to some fans.

This does agree, though, with what the series creator Aaron Korsh said in an interview with TV Line: "I didn't want to have someone who had good reason to turn him in, like [for] revenge or some ulterior motive. I specifically wanted someone [whose] only reason was it was the right thing to do."

Sheila is a Harvard placement department employee. That fact alone can give Anita Gibbs (Leslie Hope) a strong piece of evidence upon which to build up her case against Mike (Patrick J. Adams). Sheila can undeniably prove that Mike never went to Harvard University.

What made most avid viewers of the show appreciate this revelation is that it was unpredictable and unexpected. Sheila does neither hold any grudge against Mike nor want anything from him. She just did what she did out of duty.

Meanwhile, Abigail Spencer's character, Dana Scott, is coming back next week for the series' episode 13 "God's Green Earth," Korsch revealed to TV Line in a separate interview. He disclosed that the firm will need her help, but she is a little resentful of Mike's secret. Harvey (Gabriel Macht)'s former girlfriend is not going to have the greatest response" to what they're asking her to do.

"God's Green Earth" airs on Wednesday, Feb. 10, at 10 p.m. on USA Network. Watch the episode trailer below.