Brainiac 4

Brainiac 4 is the name of two fictional characters appearing in American comic books published by DC Comics.

Fictional character biography

Pre-Zero Hour/Post-Infinite Crisis

Brainiac 4
Publication information
Publisher	DC Comics
First appearance	Adventure Comics #335 (August 1965)
In-story information
Alter ego	Kajz Dox
Species	Coluan
Place of origin	Colu
Abilities	"Twelfth-level" intelligence

The Silver Age version of Brainiac 4 is Kajz Dox, the father of Querl Dox (Brainiac 5), who died when Querl was a child.

Post-Zero Hour

Brainiac 4
Publication information
Publisher	DC Comics
First appearance	Legion of Super-Heroes #107 (August 1998)
In-story information
Species	Coluan
Place of origin	Colu
Team affiliations	Dark Circle

The second Brainiac 4 first appears in Legion of Super-Heroes #107 (August 1998). This incarnation is Brainiac 5's mother and the leader of the Dark Circle who joined them in an attempt to alleviate her longtime inability to feel emotion. After being defeated by the Legion, she is committed to an asylum.

In Mark Waid's Legion of Super-Heroes reboot, Brainiac 4 appears as one of several Coluans who were infected with a mind-altering illness during an attack on the United Planets.

In other media

Brainiac 4 appears in Legion of Super-Heroes (2023), voiced by Robbie Daymond. This version is a clone of Brainiac and member of the Dark Circle who was created to steal the Miracle Machine. After his failure to do so, Brainiac fuses him into himself, but Brainiac 5 later manipulates Brainiac 4 and his fellow clones into fighting and killing one another from the inside.