"Operation: V.I.R.U.S."
Season 5, Episode 58
Mission: 103
Production Code: 506
Airdate: Jan 14, 2006
Writer(s): Andy Rheingold
Tom Warburton
Storyboards by: Kim Arndt
Jesse Schmal
Episode Guide
Previous Mission
"Operation: N.A.U.G.H.T.Y."
Next Mission
"Operation: O.U.T.B.R.E.A.K."

Very Icky Research Under Surveillance


Summary: Numbuh 5 tries to save her sister Cree from a disease that KND have made in revenge for creating chicken pox.


Operation: V.I.R.U.S./Transcript


  • This is the beginning of a story arc continuing onto Operation: O.U.T.B.R.E.A.K.
  • For some unknown reason (possibly old habits), Numbuh 1 keeps a comb with him.
  • The quote that Abigail said "well, you may be my arch-enemy, but you're still my sister." is the similarity to a quote from "Acceleracers: The Ultimate Race" where Nolo Pasaro said to Kurt Wylde about a conflict with his brother Mark Wylde "He not Teku Kurt, but he's your brother". Although some shows have different conflicts between brothers and sisters.
  • This is the first episode to have premiered in 2006.