CBS has released a synopsis for “Supergirl’s”April 11th episode, an installment titled “Myriad.” The episode rundown reveals that Eve Torres Gracie has been cast as Maxima and will appear in the episode along with returning villains Non (Chris Vance) and Indigo (Laura Vandervoort). The episode will feature Supergirl (Melissa Benoist) challenged by Non and Indigo’s latest attack, which turns National City’s population into their personal army.