The showdown between Team Arrow and Deathstroke will continue after Slade Wilson goes on a rampage that hits the team where they live on this week's all-new episode of "Arrow."

A number of game-changing secrets were revealed in the last episode, "Deathstroke." First, Slade, aka Deathstroke, kidnapped Thea and told her that her real father is villain Malcolm Merlyn. Slade also revealed to Laurel that Oliver Queen is the man behind the Green Arrow. Plus, it was discovered that Isabel Rochev is secretly working for Slade after Oliver appointed her as CEO of Queen Consolidated, reports Movie News Guide.

In the next installment, "The Man Under the Hood," Thea will reach a breaking point after getting dumped, kidnapped and learning that her mother and Oliver have been lying to her about her father's identity. Oliver will also have to decide what is more important--his family or finishing his feud with Slade. In addition, Laurel will grapple with the discovery that Oliver is really the Green Arrow. According to TVLine, executive producer Andrew Kreisberg teased how she will react. "I think that people have been primed to expect Laurel's reaction to be one thing and they're going to be very surprised by her actual reaction," he said.

Kreisberg also discussed speculation about Isobel's true identity with TVLine. One theory is that she is really Slade's daughter Rose Wilson, while there are other rumors that she is a former mistress to Robert Queen. "There are always two ways to go ... But you will get a lot more about her backstory and her motivations in the next episode," teased Kreisberg.

In the buildup to "The Man Under The Hood," The CW released a preview video that suggests that the Mirakuru may come with a cure. In the clip, Dr. Ivo pleads for his life telling Anatoli Knyazev and Oliver that he can help them defeat Slade by giving them an antidote that would reverse the powerful Mirakuru serum.

"Please, I can help you," says Ivo in his attempt to spare his life. "You can still stop Slade Wilson!" he says, instantly grabbing Oliver's interest. "I can turn him back," Ivo says referring to Slade. When Oliver demands a clearer answer, Ivo responds, "The Mirakuru ... there's a cure."

The official synopsis for "The Man Under the Hood" states, "Oliver (Stephen Amell), Canary (Caity Lotz), Diggle (David Ramsey) and Felicity (Emily Bett Rickards) return to the lair and find Slade (Manu Bennett) waiting for them. An epic battle breaks out and one member of Team Arrow is sent to the hospital. Thea (Willa Holland) hits her breaking point, but just as Oliver is about to reach her, Slade intervenes and Oliver is faced with a choice - his battle with Slade or his family. Meanwhile, Laurel (Katie Cassidy) struggles with a new secret."

Although Barry aka The Flash is still in a coma, Ksite revealed that guest stars from "The Flash" will make an appearance in Episode 19. Two characters from the Flash pilot, which may be added to The CW's Fall lineup, will show up in the form of Carlos Valdes' Cisco Ramon and Danielle Panabaker's Caitlin Snow.

Furthermore, "Arrow" fans hoping to learn more about Felicity's father will be in luck in the upcoming episodes and in Season 3.

"We actually will get a little bit more of Felicity's backstory...," said Kreisberg. "You get a couple of hints, and when you hear what some of the hints are, you're going to look back and realize that we actually knew [what we were planning] back in Season 1."

"Arrow" S2E19, "The Man Under the Hood," airs Wednesday, April 16 at 8 p.m. EDT on The CW.

Watch the official trailer and a sneak peek video below.