'Orphan Black: Echoes' flashback episode reveals Kira's love story with Eleanor Miller, explaining her connection to Lucy.

'Orphan Black: Echoes' flashback episode reveals the love story between Kira (Keeley Hawes) and Eleanor Miller (Krysten Ritter), explaining why Kira created the printout of Lucy. The story showcases their relationship from college to marriage, having a child, and Eleanor's battle with Alzheimer's. The episode sheds light on Kira's past and her connection to the character now known as Lucy.