| "...You know how they rushed to get this place finished."
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"Just because you're paranoid doesn't mean they aren't after you."
- – Zack Allan, reciting an old saying
Zack spent much of his early life in city environment, but one summer he went to visit his favorite uncle in the country. During the visit, he wandered in the forest when he saw a sight of a dead possum surrounded by insects. Zack would remember the sight—and the stench—for many years to come.
He became Garibaldi's fugleman or second in command in 2259, after it was discovered that the previous holder of that position, Jack, had shot Garibaldi, leaving him in a coma and almost killing him.
Allen led the teams that supported Derek Cranston in his search for Everett Jacobs using special scanning devices. Unbeknownst to him, he got very close and saw a signal on his device, but it vanished.
When Nightwatch first came to the station in 2259, Allan joined primarily based on the 50 credits a week he would be paid in addition to his regular paycheck. Over the next year, however, he slowly began to realize Nightwatch's fascistic nature, developing serious moral qualms with their actions and tactics. After witnessing firsthand what they did to a shopkeeper who had badmouthed President Clark, he agreed to help remove the organization from the station when the command staff met him in his quarters. He gave a half-true story to the head liaison that there was a Narn force incoming on the station to replace the Nightwatch. He led the liaison and the rest of the Nightwatch into the docking bay, then gave the signal to close the doors and quickly slid under at the last second.
In the subsequent Battle for B5 Independence, Allan was on the security team that met an Earthforce Marine boarding party and prevented them from advancing. He had to help Garibaldi to get medical help.For his actions he was later offered the EA's Medal of Outstanding Valor, but refused to accept it.
Allan came upon an odd observation when a transport of Narns had authorization papers signed by a Centauri Abrahamo Lincolni in the Centauri embassy on Minbar. He relayed the observation to Ivanova.
When Garibaldi disappeared on December 25 2260 as the Shadow vessels withdrew from around Babylon 5 he searched for him. He got a lead on a man who found his abandoned Starfury and turned it over to salvage operations, using the man's flight plan to determine a likely location. On January 17, 2261, he led a team and found an odd craft in hyperspace. The craft ejected a pod which had Garibaldi in it, then destroyed itself. Allan brought him back to Babylon 5.
Several years later, he either resigned or retired from Earthforce and went back to Earth for a while, but quickly got bored. Reactivating his commission in July 2280, he returned to Babylon 5, which was now in the process of being decommissioned. Resuming his post as head of security, he stayed there for six months before the station's decommissioning and destruction in January of 2281.
Personal Life Edit
Zack was a good friend of Michael Garibaldi, to the point that Garibaldi even told him about his feelings toward telepath Winters and how they seemed to always bump into each other in transport. Allan spent a lot of effort tracking down Garibaldi after he was abducted by the Shadows.
Zack had been fired from several jobs and had many personal problems that proved to be a problem in keeping a job for very long. When he sobered up he got a job working for his old friend. As Garibaldi said to Zack during a discussion: "You had a lot of problems before you came here, and I know, I know you had some problems after you got here, too. But did I say anything to you about it? No. You wanna know why? Because I knew, I knew you would work it out, and you always did." 
After Lyta Alexander came to the station, Zack began harboring romantic feelings for her. He kept it deep inside, however, and was afraid to admit this fact. He finally tried to make his move when he and Lyta were stuck in a transport during the crisis involving the Thirdspace artifact, but Lyta did not respond as she was possessed by the Vorlons at the time. She finally discovered that his feelings were more than simple friendship when he tried to deter her from staying with the rogue telepaths around Byron, but she never returned his affection.
- ↑ 1.0 1.1 A Spider in the Web
- ↑ 2.0 2.1 2.2 "Thirdspace (Novelization)"
- ↑ War Without End, Part I
- ↑ Chrysalis
- ↑ Hunter, Prey
- ↑ The Coming of Shadows
- ↑ 7.0 7.1 Divided Loyalties
- ↑ Convictions
- ↑ In the Shadow of Z'ha'dum
- ↑ Messages from Earth
- ↑ Point of No Return
- ↑ Severed Dreams
- ↑ Sic Transit Vir
- ↑ 14.0 14.1 The Summoning
- ↑ Epiphanies
- ↑ 16.0 16.1 16.2 Sleeping in Light
- ↑ JMS usenet commentary
- ↑ Unknown reference
- ↑ And All My Dreams, Torn Asunder
- ↑ Secrets of the Soul
|Main Characters (Babylon 5)|
|Commander Jeffrey Sinclair Captain/President John Sheridan Lt. Commander/Commander Susan Ivanova Security Chief Michael Garibaldi Ambassador Delenn Dr. Stephen Franklin Talia Winters Lennier Marcus Cole Captain Elizabeth Lochley Vir Cotto Lieutenant Warren Keffer Na'Toth Security Chief Zack Allan Lyta Alexander Ambassador/Citizen G'Kar Ambassador Londo Mollari|