Gregg Sulkin as "The Perfect Brother" in "The Haunting Hour"

There's another exciting guest-star on an all-new episode of "R.L. Stine's The Haunting House: The Series!"

This week Gregg Sulkin guest-stars in this episode.  In "The Perfect Brother," Gregg plays a brother that's a little TOO perfect.

Catch a sneak peek of what to expect below!

You can see the entire episode when it airs this Saturday at 8:30 PM ET on The Hub Network.

Photo: The Hub