It’s time to begin chilling the pinot grigio because things are about to get hot, hot, hot as “Mistresses” returns to the small screen with its sizzling Season 4 premiere Monday. But before ABC’s hit series starts raising temperatures with its steamy storylines, check out the jaw-dropping drama that plagued our favorite threesome during the show’s epic Season 3 finale.

Before the chaotic episode left fans with a major cliffhanger, it answered one of the audiences’ biggest Season 3 questions: Who killed Luca (Noam Jenkins)? Viewers learned the identity when Joss (Jes Macallan) made her way to Calista’s (Jennifer Esposito) home only to be greeted by a shadowy figure resembling her fashion friend-turned-foe.

The mysterious lurker turned out to be none other than Calista’s assistant Wilson (Jarod Joseph), to whom the designer was romantically linked while she was married to Luca. Wilson proved to have more than just feelings for his employer when he unveiled his Calista-inspired ensemble, wig and all. But it was Wilson’s deadly accessory that truly shocked Joss as he pulled a gun on her.

Wilson’s wild stunt not only put Joss’ life in jeopardy but also forced her to miss a flight to Europe with Harry (Brett Tucker). The sexy chef was offered the job of a lifetime in Season 3 that would require him to eat overseas for a Food Network reality-television show. But Harry boarded the plane without his beau: Unbeknownst to him, the reason Joss missed the takeoff was because she was being tortured by a psychotic murderer.

The unveiling of Luca’s killer wasn’t the only moment that shocked fans in the finale. Viewers were also taken aback when they were asked to bid their final farewells to Vivian (Sonja Bennett), who succumbed to her terminal illness. The audience watched both Karen (Yunjin Kim) and Alec (Ed Quinn) suffer as they coped with the loss of Vivian and the end to their thruple in very different ways. Unfortunately for Karen, who was pregnant with Alec’s child, she was left to mourn Vivian’s death alone while the father of her unborn child decided to disappear to grieve on his own.

Although the finale was quite dark, there were some lighter moments woven into the gloomy episode — such as the explosive hookup of April (Rochelle Aytes) and Marc (Rob Mayes) . After a season full of flirting, the two decided to submit to their feelings by putting themselves out there. And their bravery was rewarded when they confessed their love for one another.

However, the Season 3 finale didn’t exactly conclude on a high note. Titled “Goodbye Girl,” the episode finished with Calista’s fate quite literally hanging in the balance as it was revealed she had smuggled a noose into her jail cell.

Viewers can tune in to the Season 4 premiere of “Mistresses” Monday, May 30, to find out what’s next for their favorite girls in ABCs hit show.