Pilar McCawley (Linda Hamilton), the long missing wife of Rafeand mother to Christie (and thus an in-law to the Tarrs), Luke and Quentin. Regular viewers will remember that Pilar (only spoken about before, never seen) had suffered from a mental illness. In the aftermath of the aliens' arrival on Earth, her medication stopped being produced, leading to some dangerous and violent behavior (as in, she tried to kill her kids). Rafe banished her. Pilar returned for Season 2.