As if this season of “The Bachelorette” weren’t dramatic enough with Ryan, Kupah and Clint, the ABC reality show added another twist: former contestant Nick Viall. The 34-year-old software sales executive was the runner-up during Andi Dorfman’s 2014 season and caused some controversy when he revealed in the “After the Final Rose” special that he had slept with the star. Now he’s back, and the cast -- and Andi -- are not happy about it.

Andi took to Twitter to voice her opinion after Nick made his appearance on “The Bachelorette” in episode 4 Monday. The starlet made sure to give Season 11 "Bachelorette" star Kaitlyn Bristowe a warning: “RUN!”

For those unfamiliar with Nick, he entered Season 10 of “The Bachelorette” as a shy and sweet contender for Andi’s heart. However, after receiving the first impression rose Nick’s attitude changed. He quickly became one of the most hated cast members, upsetting the other men in the house with his cocky attitude and controlling nature with Andi.

In the end, Andi chose to dump Nick before the final rose ceremony -- and he did not take it well. He reportedly made several attempts to see Andi, and resorted to giving host Chris Harrison a letter for her. Nick finally came face-to-face with his ex during the “After the Final Rose” special, where he announced they had had sex in the Fantasy Suite.

“I’m not sure why you made love to me,” he said to her during the special. Andi responded at the time that his comment was “below the belt.”