The CW has released a stills from “Progeny,” the Thursday, April 19 episode of Smallville guest-starring Lynda Carter.

After Lex (Michael Rosenbaum) discovers Chloe’s (Allison Mack) mother Moira (Carter) has the power to control meteor freaks, he develops a drug to wake her from her catatonic state in the asylum, then threatens to kill Chloe unless she uses her power to help him. Clark (Tom Welling) helps Chloe break into the asylum to rescue Moira and finally get to know her mother.

The episode was written by Genevieve Sparling and directed by Terence O’Hare.