“Quarantine” is episode thirteen of season four of Stargate: Atlantis.
Rodney McKay is about to propose to Katie and, as a result, is nowhere near a computer when an error causes the entire city to lock down in a false quarantine.
The episode has most of the major characters shut up together in small groups. Sheppard is worried because he is trapped with a pregnant Teyla, and that’s the point in a film when the woman gives birth. Rodney is worried because he’s Rodney.
Not a lot of action but quite a bit of humour in this one.