Hayte - Umbrood Lord?
They were informed that children were being born with deformities in areas that that the circus had visited, and upon investigating the circus while it was based at the stone circle at Avebury found that the owner was in a compact with an entity calling itself Hayte.
During the confrontation, the would-be Infernalist enabled Hayte to open a portal from its realm to ours. Hayte snatched Tyger as a captive, taking him back to his Realm which was modelled on a fiery view of Hell. There, while Tyger's companion's battled to rescue him, Hayte proposed several moral choices for Tyger to make, and revealed something of Tyger's past to him.
Tyger resisted Hayte, and kicked it off a precipice before fleeing with his companions, pursued by Hayte's minions, back to our reality. Nathaniel attempted to seal the portal has they escaped, and was apparently consumed in its implosion. There is some conjecture that Hayte stage-managed the whole episode for its own ends, but what benefit it could have gained is unclear at this time...
