Law & Order veteran S. Epatha Merkerson has joined CBS’ untitled Susannah Grant supernatural medical drama pilot. Jonathan Demme is directing the pilot, from CBS TV Studios and Timberman/Beverly, which centers on Michael (Patrick Wilson), an ultra-competitive surgeon whose life is changed forever when his ex-wife (Jennifer Ehle), a doctor running a free clinic, dies and begins teaching him what life is all about from the hereafter. Merkerson will play Michael’s assistant Rita. Without her help, he probably wouldn’t make it through the day as she is really the person running the office. Sassy and strong willed, Rita is not someone you should cross. Merkerson joins another late addition to the cast of the medical drama pilot, Julie Benz. Merkerson was approached for several projects in her first pilot season following her 16-year stint on Law & Order. The Emmy-winning actress, repped by ICM and Bob McGowan plays the lead in the upcoming Lionsgate/Tyler Perry movie We the Peoples, now in post-production.