From The TimeSplitters Wiki

Jed
Unlocked by	Get all golds in challenges
Species	Zombie
Size	Normal
Accuracy	N/A
Agility	4
Stamina	6
Fire Proof	2
Shock Proof	5
Default AI	4
Native TimeZone	1994
First Appearance	TSFP
Relations	None
Games	TSFP

TS1 Gesture	N/A	TSFP Gesture	Swings a baseball bat around his body, alternating arms and then hits himself on the head with it, knocking him out
TS2 Gallery	N/A	TSFP Gallery	Jed's dead, baby.

Another Zombie back from the dead to haunt us all with their story from the 70s. Not much is known about this guy. He looks like a hippie, and has a beard, vest, and crucifix round his neck. He only features in TimeSplitters: Future Perfect

He is known to be a difficult character to unlock in the game.