|Off With Her Head|
|Season 7, Episode 11|
A SHROUD OVER NATIONAL CITY- When Essen notices a familiar pattern to a string of over-the-top killings, she calls in Detective Bradley for aid and J'onn plans a sisters night for Kara and Alex. Livewire also helps Sarah to crack her case.
- Melissa Benoist as Kara Danvers/Supergirl
- Chyler Leigh as Alex Danvers
- Katie McGrath as Lena Luthor
- Odette Annable as Reign (credit only)
- Tyler Hoechlin as Clark Kent (credit only)
- Olivia Wilde as Susannah Russo
- Jenna Dewan as Lucy Lane
- Minka Kelly as Dawn Granger
- Claire Holt as Karen Starr/Power Girl
- Michael Rosenbaum as LX-52
- Emmy Rossum as Zaora Dru-Zod (credit only)
- with David Harewood as J'onn J'onzz/Martian Manhunter
- and Mehcad Brooks as James Olsen (credit only)
- Matthew Fox as Graham Etchison/Abattoir
- Emmanuelle Chriqui as Sarah Essen
- Rachel Nichols as Slam Bradley
- Brit Morgan as Livewire
- Tamzin Merchant as Lyra Strayd
- Antagonist: Graham Etchison
- Reign, Sam, Clark, Zaora, and James do not appear in this episode.
- This episode is Essen-centric.
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