[s18e8] Chasing Theo -

: Played by Rachelle Lefevre , Theo's party-loving, neglectful mother.

: Played by Zoe McLellan , Nadine's ex-girlfriend who also fights for Theo's well-being. [S18E8] Chasing Theo

: Played by Robert John Burke, whose relationship with Olivia Benson reaches a turning point in this episode. Major Themes & Developments Chasing Theo - Law & Order: Special Victims Unit - IMDb : Played by Rachelle Lefevre , Theo's party-loving,

: Played by Iain Armitage (best known for Young Sheldon ). : Played by Rachelle Lefevre

: Played by Adriana DeGirolami , the nanny who abducts Theo.