Lie to Me (2009)

S1E10 Better Half

In this episode, Assistant U.S. Attorney Zoe Landau, who happens to be Lightman's ex-wife and Emily's mother, seeks his expertise in unraveling an arson case with a 5-year-old boy as the sole witness. As they work together, it's evident that lingering emotions still exist between Zoe and Lightman. Meanwhile, Foster and Torres delve into a murder investigation involving a rapper who has become a prime suspect.