Archeology may prove deadly for Coulson’s team as they make for the alien city tonight on Agents of S.H.I.E.L.D. season 2, episode 9.

Somewhat unnervingly titled “Ye Who Enter Here,” the episode title gives us a hint at what to expect. According to Dante, the words “Abandon hope all ye who enter here,” are inscribed above the entrance to Hell.

The synopsis for Agents of S.H.I.E.L.D. season 2, episode 9 definitely suggests that darkness looms ahead.

“S.H.I.E.L.D. discovers the ancient city before Hydra,” ABC says, “but uncovering the secrets may require one of Coulson’s team to make the ultimate sacrifice. Meanwhile, May and Skye race to get to Raina before Whitehall takes her.”

Happy thoughts, guys. Happy. Thoughts.

“Happy” was in rather short supply on the latest episode of Agents of S.H.I.E.L.D.. Ward tortured a confession out of his big brother, Christian, then murdered his whole family and joined up with Daniel Whitehall. Whitehall, we learned, only acquired his mysterious youth after ageing and then hacking apart Skye’s ageless mother.

Related: Agents of S.H.I.E.L.D.‘s alien visitors identified as Kree!

That made Skye’s dad a little angry, and he vowed revenge… but he’s not angry enough to join Coulson, with whom he had a tense standoff over poor Trip’s bleeding body. But Trip’s okay and Mysteryville has been located – so we’re in good shape, right?

Well, let’s check out the preview for “Ye Who Enter Here.”

Oh good, evil nega ninja May Agent 33 is back! And she’s pissed.

Two sneak peeks from Agents of S.H.I.E.L.D. season 2, episode 9 give us more information on Agent 33, as well as Coulson’s plans, while still photos from tonight’s episode take us right down the rabbit hole.

Where to watch ‘Agents of S.H.I.E.L.D.’ season 2, episode 9:

New episodes of Agents of S.H.I.E.L.D. season 2 will be available online on ABC.com, and Hulu. Fans can also purchase the episodes for immediate viewing on Amazon and iTunes.

Agents of S.H.I.E.L.D. season 2, episode 9, “Ye Who Enter Here,” airs tonight at 9:00 p.m. on ABC.

What are your predictions for ‘Ye Who Enter Here’?