Chasing Theo | [s18e8]

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

: Played by Rachelle Lefevre , Theo's party-loving, neglectful mother. [S18E8] Chasing Theo

: Played by Adriana DeGirolami , the nanny who abducts Theo. : Played by Iain Armitage (best known for Young Sheldon )