Codename: Kids Next Door — Season 4, episode 21 watch online

Episodes — Season 4

1. 1 Episode 1 «Operation: R.A.B.B.I.T.» November 19, 2004
2. 2 Episode 2 «Operation: F.L.U.S.H.» November 19, 2004
3. 3 Episode 3 «Operation: F.O.O.D.F.I.T.E.» November 5, 2004
4. 4 Episode 4 «Operation: C.L.U.E.S.» November 5, 2004
5. 5 Episode 5 «Operation: N.U.G.G.E.T.» December 3, 2004
6. 6 Episode 6 «Operation: M.A.C.A.R.R.O.N.I.» December 3, 2004
7. 7 Episode 7 «Operation: P.O.O.L.» November 19, 2004
8. 8 Episode 8 «Operation: C.A.K.E.D.-F.O.U.R.» November 26, 2004
9. 9 Episode 9 «Operation: S.I.T.T.E.R.» April 29, 2005
10. 10 Episode 10 «Operation: S.A.T.U.R.N.» April 29, 2005
11. 11 Episode 11 «Operation: C.H.O.C.O.L.A.T.E.» December 10, 2004
12. 12 Episode 12 «Operation: M.A.T.A.D.O.R.» December 10, 2004
13. 13 Episode 13 «Operation: L.U.N.C.H.» February 21, 2005
14. 14 Episode 14 «Operation: M.U.N.C.H.I.E.S.» February 21, 2005
15. 15 Episode 15 «Operation: K.N.O.T.» April 29, 2005
16. 16 Episode 16 «Operation: C.L.O.S.E.T.» April 29, 2005
17. 17 Episode 17 «Operation: S.N.O.W.I.N.G.» May 20, 2005
18. 18 Episode 18 «Operation: M.A.U.R.I.C.E.» July 8, 2005
19. 19 Episode 19 «Operation: L.O.V.E.» July 15, 2005
20. 20 Episode 20 «Operation: C.O.U.C.H.» July 15, 2005
21. 21 Episode 21 «Operation: D.O.D.G.E.B.A.L.L.» July 22, 2005
22. 22 Episode 22 «Operation: F.E.R.A.L.» July 22, 2005