Based on the search results, Episode Overview: " Cracking the Code " (S02E04)
Lucy helps Ethan (the humanoid robot) attempt to recover memories of his mother. Extant Subtiitrid Eesti S02E04
The storyline continues to track the alien hybrids (referred to as Ahdu) who are planning to intentionally impregnate women to create a new culture. Based on the search results, Episode Overview: "