The Week of Hell

The Week of Hell was a timespan during which The Party was trapped in the Shadowfel following Swayne's use of the Curse of Netharin against them as they left Mount Pillar with Zaheer and William Black. It lasted from Episode 50: Him to an as yet unknown future episode wherein it was somehow resolved, most likely by their return to the Fadelands either via a natural portal or by waiting for the curse to wear off.
This period was largely categorised by The Party travelling with Rygax, as they attempted to escape Swayne's forces. Eventually, they crossed the border into Cornello's territory, only to have to flee again after killing the latest Baron Deathmoor, with Draven stealing the blessing of the Oluana Spring for himself. After briefly attempting to escape via The Underpass, the group found themselves in the Realm of the Albtraum.