J'onn J'onzz / Martian Manhunter — Supergirl Character Profile

About J'onn J'onzz / Martian Manhunter

Director of the Department of Extra-Normal Operations (DEO) and a Martian refugee. Guides Kara in mastering her abilities, leads Earth's defense against extraterrestrial threats, and acts as a strategic mentor and father figure.

Character Facts

Played by

David Harewood

Appears in

Supergirl (2015)

Role

Supporting

Relationships (3)

• J'onn J'onzz / Martian Manhunter — Commanders — Kara Danvers / Supergirl / Kara Zor-El (Melissa Benoist)

  A steadfast partnership that transformed from mentor-mentee to strategic commanders through corporate and cosmic crises.

  J'onn reveals past and trains Kara (S1E17, S2E3), they investigate Legion and Worldkillers (S3E3, E10), J'onn returns to lead DEO (S4E1), they fight O...

• J'onn J'onzz / Martian Manhunter — DEO Founders — Alex Danvers / Sentinel (Chyler Leigh)

  A foundational command partnership that adapted from field operatives to strategic leaders across six seasons.

  Co-found DEO and investigate Cadmus (S1E7, S2E2), manage Legion and Worldkillers (S3E10, E13), Alex takes DEO control during J'onn's absence (S4E2), l...

• J'onn J'onzz / Martian Manhunter — DEO Coordinators — Querl 'Brainy' Dox / Brainiac-5 (Jesse Rath)

  A relationship that evolved from cautious DEO coordination to mutual respect as Brainy's future knowledge proved vital.

  Brainy and J'onn join alien march (S4E14), J'onn investigates Brainy's Lex ties (S5E12), J'onn supports time travel mission (S6E5).

Explore the full interactive character relationship map of Supergirl

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