Mary Beth

Mary Beth was one of the graduate students trained by Dr. Charles Reid of the Progenitors. Fellow student Andrew Greene described her as a "Southern belle" who graduated summa cum laude from Duke University and already had five papers published by the time they began their program.

Mary Beth ingratiated herself in turn to Andrew, then Rob, then the research assistant at the cloning lab, depending on what would help her succeed in the program. She reacted with distress when Rob disappeared, and appeared not to recognize her upon his return. It is not clear if she, like Andrew, has realized that the second Rob is a clone.