User blog comment:Gifist8/Is The Musical Episode Going To Be Good Or Bad?/@comment-26618197-20170320193858

Ok, slight spoilers for the preview but it seems that there's some kind of mystery going on here that I hope they explain. I mean sure he knows Kara, he probably knows Barry from last time, but how did he know about the dimensional thingy? Oh well we'll discuss it further tonight after complaining about the soap opera that it Mon-El and Kara.