Karen Slack's performance in the title role of Medea was large enough to allow for myriad interpretations. She was alternately achingly human and vulnerable and profoundly evil. There are few actors around with the power to fully embody a role as large as this, but Slack's power felt almost boundless. Sometimes her Medea was almost pleasant, even mildly funny, but periodically a huge rage rose, possessing her mind and body and consuming those around her. She's filled with sorrow for the children she feels compelled to kill, but she's still the same woman who coolly planned her escape following their deaths. When Medea stands on a platform with the children's corpses at her feet, her hands gloved in blood, and Jason — her faithless lover — laments having brought a barbarian into a civilized place, you note the essential racism, but in that terrible moment, you fully accept the description.