To start with, the universe expands again as DC has decided to start their own streaming service, and will be starting with Swamp Thing.  The existing shows continue unabated and show no signs of Dropping Coverage of their defined corners. Lucifer’s ladies enjoy a bachelorette party, Supergirl does Outbreak, The Flash guest stars Cisco’s girlfriend, Supergrandpa continues the dystopia of Krypton, and Oliver starts to recognize how useless a quiver of one is.

The House of Ideas gives us a heartbreaking return to corporeality on Legion and the Agents goes back to aliens.  Allegiances shift in Riverdale so the “Archie” relations become even less recognizable.

[All synopses (and titles) from Trakt.tv below the cut.  (If a show’s synopsis is a spoiler to you, do not click More…)]

Lucifer – S03E22 – All Hands on Decker – When Chloe takes some time off, Lucifer is forced to work with Dan on a murder case involving a dog show. Meanwhile, Charlotte and Maze have differing ideas for Chloe’s party and after a wild night, Chloe rethinks a life-changing decision.

Supergirl – S03E16 – Of Two Minds – Supergirl and Imra have different ideas on how to stop the third Worldkiller, Pestilence. However, when both Alex and Winn are seriously injured by Pestilence, Supergirl and Imra team up to stop the destruction.

The Flash – S04E20 – Therefore She Is – Barry and Team Flash team up with Gypsy to try to thwart Thinker’s plan. Meanwhile, Cisco and Gypsy have a heart to heart talk about their relationship.

Krypton – S01E07 – Transformation – After a failed coup, Daron punishes the conspirators. Lyta and Dev go in search of Jayna.

Arrow – S06E21 – Docket No. 11-19-41-73 – The pressure mounts for Oliver who begins to wonder if he will lose everything in his battle to save Star City. A familiar face returns.

Legion – S02E05 – Chapter 13 – An uneasy reunion leads to a shocking truth.

Marvel’s Agents of S.H.I.E.L.D. – S05E20 – The One Who Will Save Us All – A newly determined Talbot takes Coulson to meet the enemy and attempts to avert Earth’s destruction.

Riverdale – S02E20 – Chapter Thirty-Three: Shadow of a Doubt – As the town’s mayoral race between Fred and Hermoine heats up, Hiram sets his sights on a new ally – Sheriff Minetta. Betty turns to Cheryl for help when she has a suspicion about the Black Hood. Meanwhile, the reveal of a dark secret forces Archie and Jughead to try and ease tensions between the Bulldogs and Serpents. Finally, on the eve of the mayoral debate, a mysterious message leaves everyone on edge.