The mud had reached itself to about the Doctor's middle, and he felt the things beneath the surface start to twine their way around him, to hold him in place.

He gripped Jack's arms and hoped to whatever deities or Guardians might be out there that Jack not rip in half this time. But, as Jack tugged, the Doctor found his body slipping prone in the liquid and then, slowly out.

"Right, that's it. One more pull---"

A long, black tentacle shot out of the mud and gripped the Doctor around the middle, pulling back sharply.

"Not good! Not good!"