The Hyach are a humanoid race and were members of the League of Non-Aligned Worlds and are a member race of the Interstellar Alliance. They can distinguished from other races by their distinctively shaped skulls that feature two prominent lobes at the back of the head bifurcated by a line of spotted scales that runs from the bridge of the nose, up and over all the way to the back of the cranial cleft. Hyach Civilization is very peaceful and has endured for 7,000 years but the have a dark secret in their history – the extermination of the closely-related Hyach-do.
In the episode ‘Secrets of the Soul’ Dr Franklin discovers the secret of the Hyach-do when Amabassador Miziri Tal (Jana Robbins) authorised the release of her people’s medical records to the Interstellar Alliance’s Xenobiologicial medical database overseen by Dr Franklin. The Hyach accepted the risk that the secret might be exposed but considered . to become part of the new Interstellar community
However, her attache Kirrin (Fiona Dwyer) was violently opposed to the policy and when Dr Franklin discovered the secret she threatened to kill him.
The makeups for Babylon 5 were originally designed by John Vulich and Optic Nerve Studios; Everett Burrell was the makeup effects creator (seasons 1 & 2); Jeff Farley was the special makeup effects supervisor (season 5 & the TV movies); Mike Measimer was shop supervisor and also an on-set makeup artist.