Sandra Zins (Phyllis Logan) is a villainess from "The Lost Love in the Foreign Land," episode 10.06 of Bones (airdate November 6, 2014).
Sandra Zins' introduction showed her being interviewed by Seeley Booth and James Aubrey, as she was the owner of a watch that was found with the murder victim, Ming-Yung (aka Teresa). Teresa was Sandra's maid, as Sandra revealed that she hired though an agency known as Sunny Helpers. However, as the investigation revealed, the agency was part of a human trafficking ring, with Sandra conspiring with the agency's owner, Victor Lin, to bring in Teresa and other young women from China and take their earnings as payment.
After the reveal, Sandra was interrogated by Booth and Aubrey, with Alex Radziwill presenting evidence of Sandra's involvement. The evil Sandra claimed that she was helping these women, adding that as an immigrant herself, she knows how hard it is to get on in America. In response, Booth referred to Sandra as an exploiter, and she ended up suspected of killing Teresa. Though it was proven that Sandra didn't kill Teresa, she was arrested for her role in the trafficking scheme.