Board Thread:Spoilers!/@comment-27060727-20170218051023/@comment-27060727-20170228043759

The "EQ's lair/Hall of Mirrors" is a location on that leaked 6x20 list, so I'd agree that it's pretty likely he'll appear again. They start that episode tomorrow and he's in town.....

Sidney is probably not related to the Black Fairy if there's going to be Tiger Lily in that plot line as well, so mayyyybe if this is more than a random cameo appearance, he'll be involved in setting up 6x20?