- In her room, Rachel keeps an octagon with the yin / yang symbol in its center. This is part of the pattern of the bagua which inspired the DHARMA logos.
- Additionally, there is a copy of Carrie on the same bedstand.
- Rachel had dark hair as a child, but had blonde hair on the video Ben showed to Juliet.
- Rachel is the name of Jacob's wife in the Book of Genesis. Rachel was disgraced because she had borne no children to Jacob, but her sister and second wife of Jacob, Leah, bore six children (Genesis 30). In the end, God grants Rachel children, one of whom is Joseph (essentially restoring her honor). Rachel died in childbirth with her second son Benjamin.
- Her last name appeared on the medical chart that Ben showed Juliet revealing that Rachel's cancer had returned. Template:Crossref
- The name "Rachel Carlson" is similar to Rachel Carson, who is the author of "Silent Spring", a seminal work that documented the harmful effects of pesticides on birds and on the environment as a whole. Carson's research showed that pesticides like DDT caused the egg shells of birds to become too thin, among other reproductive problems.
- Did Jacob visit her off of the Island in order to heal her as Ben claimed?