'Doctor Who' Preview: Season 8 Episode 9 “Flatline” Photos & Videos [SPOILERS] - The Doctor Is Trapped, Clara Is On Her Own, And Even The Walls Are Out To Get You!

After dealing with a "Mummy on the Orient Express" last week, The Doctor and Clara go on another adventure in season 8's episode 9, "Flatline." This time, however, the Doctor is trapped leaving Clara on her own to deal with "a new menace from a new dimension!" Check out some preview photos and videos from the new episode of Doctor Who below! (SPOILERS to follow)

While a mummy is pretty scary on its own, we've gotten through that problem and have to deal with menacing walls. That's right - walls! Not even walls are safe in this new episode, featuring Clara taking the sonic screwdriver and trying to save the world without the Doctor!

From the looks of these great new preview clips of the episode, we're in for some optical illusions and great graffiti! You know how some art can play tricks on your eyes, right? Well imagine if someone, or something, used this tactic to trick you and possibly turn you into that graffiti?

Check out these new clips and images below to get a taste of what's in store for us with this weekend's episode, "Flatline":

What do you think of these preview photos and videos? Are you excited for "Flatline" and Clara's adventure without the Doctor around to help out? Share your thoughts and opinions in the comments section below!

Here is the episode's official synopsis (via BBC America):

Separated from the Doctor, Clara discovers a new menace from another dimension. But how do you hide when even the walls are no protection? With people to save and the Doctor trapped, Clara comes up against an enemy that exists beyond human perception.