Season 4 aired between 14 Jun 2003 and 25 Sep 2004, 13 episodes.
Episodes
E01
XL: Samurai vs. Ninja
14 Jun 2003
E02
XLI: Robo-Samurai vs. Mondo Bot
21 Jun 2003
E03
XLII: Samurai vs. Samurai
28 Jun 2003
E04
XLIII: The Aku Infection
05 Nov 2003
E05
XLIV: The Princess and the Bounty Hunters
12 Nov 2003
E06
XLV: The Scotsman Saves Jack (1)
23 Aug 2003
E07
XLVI: The Scotsman Saves Jack (2)
23 Aug 2003
E08
XLVII: Jack and the Flying Prince and Princess
19 Nov 2003
E09
XLVIII: Jack vs. Aku
24 Nov 2003
E10
XLIX: The 4 Seasons of Death
25 Sep 2004
E11
L: Tale of X9
25 Sep 2004
E12
LI: Young Jack in Africa
25 Sep 2004
E13
LII: Jack and the Baby
25 Sep 2004