We have a Son of Saturn, now how about a Manhunter from Mars?
CBS has revealed that Supergirl has cast Charles Halford as DC Comics character Jemm, Son of Saturn, in the series' seventh episode, "Human for a Day." Here's the official description for the episode:
Kara and her friends must rely on their inner strength and courage when an earthquake strikes National City. Also, Alex’s mistrust of Hank reaches a breaking point when the earthquake traps them in the DEO with Jemm (Charles Halford), a powerful alien escapee, on SUPERGIRL, Monday, Dec. 7 (8:00-9:00 PM, ET/PT) on the CBS Television Network.
Halford, 35, is best known as Chas Chandler on the NBC series Constantine, and has also appeared in such television series as Agents of S.H.I.E.L.D., NCIS: Los Angeles, True Detective, Law & Order: Special Victims Unit, Vegas, and The Event.
"Human for a Day" was written by Yahlin Chang and Ted Sullivan, and directed by Larry Teng. The episode also features Laura Benanti as Alura/Astra, and Peter Facinelli as Maxwell Lord.
Created in 1984 by Greg Potter and Gene Colan, Jemm first appeared in Jemm, Son of Saturn #1 as the son of King Jaxx of the Red Saturnians, who was forced to flee the palace after a White Martian coup. His mother Jarlla was able to hide him in a cave, where Jemm was trained by his White Saturnian teacher Rahani in the use of his powers.
After both his mother and teacher were killed by the White Martians, Jemm stole a ship and escaped to Earth, in search of his lover Syrra who had fled there earlier. He arrived in Harlem, New York and was befriended by an African-American orphan named Luther Mannkin. After a series of adventures with and without Luther, Jemm eventually found Syrra. They all then travelled to New Bhok, a Red Saturnian colony. Because he refused to take sides in a civil war on New Bhok, Jemm was disavowed and cast out by both factions. Dispirited, Jemm and Luther returned to Earth.
Jemm learned that a criminal named Claudius Tull planned to use Saturnians as living energy sources. He had allied himself with a female White Saturnian named Synn. When Tull's true goal was exposed, Synn surrendered her forces to the Red Saturnian military. When last seen, Jemm had set out in search of Syrra, who had mysteriously disappeared yet again.
Jemm resurfaced years later as a member of the Injustice Gang. He had apparently been brainwashed by Lex Luthor through the use of a Philosopher's Stone and used as a psychic weapon against the Justice League. He was able to impersonate J'onn J'onnz, the Martian Manhunter, telepathically. J'onnz was able to sense and connect with Jemm's mind. J'onn's powers freed Jemm, but left him comatose. J'onn took Jemm to Z'onn Z'orr, his hidden Antarctic retreat in order to heal his mind.
Jemm spent the next several months recovering his mental and physical health. He was later discovered, detained and abused by J'onn's evil brother Malefic, who convinced the JLA that J'onn had gone insane and was torturing Jemm. While Jemm recovered at the JLA Watchtower, a delegation of Saturnians arrived to reclaim the prince. J'onn discovered that Jemm was to take part in a brokered political wedding designed to unite warring factions of Red and White Saturnians.
Supergirl airs Monday nights at 8 p.m. EST on CBS.