Oliver (Stephen Amell) will be placed in a tough situation in the next episode of "Arrow" after Nyssa forces him to kill Malcom Merlyn (John Barrowman) in order to save his sister's life.

The trailer video for Wednesday's episode, "Sins of the Father," reveals that Nyssa will bribe Oliver into killing her arch nemesis, Malcolm, by putting Thea's (Willa Holland) life on the line.

"My sister is dying," says Oliver in the preview video.

"There's only one way to prevent that," says Nyssa in response, "I want you to kill Malcom Merlyn."

The end of the video teases Oliver and Malcolm squaring off in an intense sword fight.

According to ComingSoon.net, the synopsis for Wednesday's episode reads as follows:

"Oliver receives an offer from Nyssa (guest star Katrina Law) that is hard to refuse. Meanwhile, Thea continues to battle the blood lust, Malcolm steps in to help his daughter, and Laurel has a heart to heart talk with Nyssa."

Meanwhile, "Arrow" star Emily Bett Rickards hinted that her character Felicity Smoak might get a cool super-suit to go with her new codename. Although the tech genius has never got to wear a suit or a mask, she finally adopted the codename "Overwatch" earlier this season.

During an interview with DC All Access, Rickards admitted that she wouldn't wearing a suit that would give her a break from her sky-high stilettos..

"Yeah, that's definitely in the mix," Rickards told DC All Access when asked about getting an official hero suit.

"We gotta get suits. I don't technically want a suit, because a suit means leather and squeaks. They do mean no stilettos, but they also mean lots of night shoots. You know what, the squeaks aren't that big of a burden. I'm just trying to talk myself out of wanting one if I don't have one because I don't want to be disappointed. But I will take a suit."

Season 4, Episode 13 of "Arrow," titled "Sins of the Father" will air on Wednesday, Feb. 10 at 8 p.m. ET on The CW.

Watch a preview video below: