Louie Thompson is a child that Gabriela Dawson saved from a fire in "Kind of a Crazy Idea", and later she fosters him, along with Matthew Casey, after they got married.

His father turns up in the episode "One Hundred", claiming to want Louie back. After a legal case and many complications, Gabriela realised it would be unfair to deny Louie the right to live with his real family, who genuinely loved him very much, so she gave up her rights and gave Louie back.