Who knew an imaginary friend could be so frightening? After the heart-stopping premiere of ABC’s newest drama series “The Whispers” on Monday night, viewers were left with many questions, one more prevalent than the others: Who is Drill?

In the premiere episode, several children were coaxed into committing dangerous acts under the coercion of an unknown figure. When asked who is instructing them, the children simply say its their “imaginary friend” named Drill who sometimes to talk to them using lights. While actress Lily Rabe, who plays FBI agent Claire Bennigan on the series, isn’t spoiling the mystery about the villain, she has revealed when viewers will discover the truth about his/her/its identity.

“I'm on lockdown... There’s so many things that I’m not allowed to say. But I will say this: You learn a lot very quickly,” Rabe recently told Vulture. “It’s not one of those things where you have to wait and wait and wait to get more information. Soon enough there [will be] so much more to talk about.”

While viewers may have to wait a few episodes to meet the infamous Drill -- so far theories range from an alien being to Rabe's onsc-reen husband, played by Milo Ventimiglia -- Rabe did tease there are other shocking moments in the script fans have to look forward to. “[It’s] one thing after the next. It’s that kind of a show. A lot happens in a short period of time,” she said.

Rabe explained that the series will not use many time jumps through episode 13. As for her favorite installment, Rabe said she is most excited for episodes 4 and 5. “I’m a big fan of what happens in episode five. I’ll say that,” she teased.

For viewers too scared to tune in, Rabe said they shouldn’t be worried if they were able to get through “American Horror Story” Season 1 without a hitch. Rabe, who has starred on several seasons of the FX horror anthology, said the ghost twins, played by Kai and Bodhi Schulz, in the first installment were by far more frightening than what “The Whispers” has up its sleeve.

“Oh my god, nothing gets creepier than those twins. They were unforgettable,” Rabe said when discussing the unknown presence on “The Whispers” controlling the kids, including her on-screen son Henry (Kyle Harrison Breitkopf). “You know the truth is, I don’t find the kids on this show creepy. I’m just so curious and interested in them. But I think the show will definitely be doing its job if viewers are creeped out. Between the two, I would definitely have to go with the twins, there’s no question.”

“The Whispers” airs Mondays at 10 p.m. EDT on ABC. Who do you think is Drill? Share your predictions in the comments section below.

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