Lucia Walters

An edgy janitor takes Clark's high-school class hostage at LuthorCorp, claiming his jitters were caused by a mysterious contaminant.

The agents investigate circumstances surrounding a man's death after his body disappears from the morgue.

As Michael, Lincoln and the remaining Ogygia gang try to escape Yemen, they find themselves racing through the desert from a vengeful Cyclops.

This special crossover episode sees Supergirl, The Flash, Green Arrow and DC's Legends of Tomorrow unite against an alien race called the Dominators.

Nathan and Dwight lock horns over the problem of Mara. While Dwight wants Mara to end the Troubles, Nathan still hopes to save Audrey.

Nathan makes a desperate play to protect Mara, leaving Dwight and Duke on their own to deal with a deadly Trouble that threatens to burn the town to the ground.