No problem not being nice to Dickson in this episode, because he’s absent for a discussion of a new giant virus that replicates in the cytoplasm yet transiently accesses the nucleus to bootstrap infection.

Vincent visits Melbourne, Australia and speaks with Melissa, Alex, Gilda, and Paul about their work on HIV infection of the central nervous system, West Nile virus, microbicides for HIV, and the Koala retrovirus.

Vincent, Alan, and Kathy reveal how a retrovirus in the human genome keeps embryonic stem cells in a pluripotent state, from where they can differentiate into all cells of the body.