Season 4 aired between 12 Jun 2005 and 04 Dec 2005, 12 episodes.
Episodes
E01
Broken Circle (2)
12 Jun 2005
E02
The Collector
19 Jun 2005
E03
Double Vision
26 Jun 2005
E04
Still Life
10 Jul 2005
E05
Heroes & Demons
17 Jul 2005
E06
The Last Goodbye
24 Jul 2005
E07
Grains of Sand
31 Jul 2005
E08
Vanguard
07 Aug 2005
E09
Babble On
14 Aug 2005
E10
Coming Home
21 Aug 2005
E11
Saved
28 Aug 2005
E12
A Very Dead Zone Christmas
04 Dec 2005