

In Men in Black II, when Serleena (who apparently wishes she was Zed's girlfriend) arrives on Earth, Zed sends J to restore K's memory (which he erased after the fight with Edgar the Bug) so the Light of Zartha could be sent off the earth before it could be destroyed. Later, Zed talks with K and J in his office while giving them the task to question the alien Redgick as to why he is about to leave Earth. The next day James Edwards arrives at MiB Headquarters and becomes the MiB's newest recruit, Agent J. Zed neuralyzes the other officers in the room. Zed then takes all the officers to a room for an "eye exam", except Edwards who goes with K. Zed explains that Edwards has a problem with authority but K responds that he does too, and also that Edwards earlier chased down an extremely fast alien on foot and that's got to be tough enough. All officers, including Edwards, have to answer a sheet while Zed and Kay watch from a 'mirror room,' where they cannot be seen. After Agent K brought NYPD officer, James Edwards (later Agent J) into a training course for recruiting MiB personnel, Zed is seen talking to the many highly ranked officers, until Edwards arrives late and Zed tells him to sit. In the first film, Zed is the Chief/Head of MiB.

There is evidence that before he took the role of overseeing MiB, Zed enjoyed fishing. Its known he was born in the 1930s though. In fact, he once discouraged Jay from looking into Kay's past, then, with even more emphasis, told him never to ask him about his past. Zed chooses not to say much about his life before MiB.
MEN IN BLACK ZED SERIES
Zed, as seen in the Animated Series Before MiB It is not clear if Zed is a human or just a voice made by computer, but the only sure is the voice is male.

Not even received a face in an episode where Jay tried to escape from MiB headquarters. In the original comic book series, Zed is just a voice that indicates Jay and Kay their missions without having a physical appearance. In both he has a serious voice, however he jokes around a little in the films.
MEN IN BLACK ZED PLUS
Plus he has a different voice actor, so his voice is changed. However, in the animated series, he is older, little overweight and he has white hair, dark circles under his eyes, and has no goatee. 2.2 Films and Animated Series Continuity.
