Our Astrid gets an unexpected visit from her Alternate, while Peter and Olivia track a killer using a toxin that has yet to be invented. Both universes collide in a case that pushes the boundaries of what is possible.
Episode rating
Cast of episode
89
5
3
2
- Astrid Farnsworth
- Olivia Dunham
- Peter Bishop
- Dr. Walter Bishop
- Lincoln Lee
- Phillip Broyles
- Nina Sharp
- Neil Chung
- Jared Colin
- MIT Professor
- Stephen Farnsworth
- Boston Cop
- Medical Examiner
- Chet Williams
- TSA Agent
- Doctor #1
- Kerry Watson
- Doctor Brody
- December
- Anne Chung
- Guard
- March