|“||If you get too worried about what could go wrong, you might miss a chance to do something great.||”|
—Samuel Holt, Tears of the Balmera
Samuel Holt is a character featured in Voltron: Legendary Defender and the father of Matt and Katie Holt who went missing after being taken prisoner by the Galra Empire during the Galaxy Garrison's expedition to Kerberos.
Sam Holt was a scientist with Galaxy Garrison, who along with his son Matt embarked on a mission to Kerberos with Shiro serving as their pilot. He left his daughter Katie and his wife behind on Earth, only to be captured by a ship from the Galra Empire and sent to a work camp due to being unfit for gladiatorial combat. The disappearance of the Kerberos crew was publicly deemed an accident by Galaxy Garrison, but Katie refused to accept this and infiltrated the organization under the false identity of Pidge Gunderson to learn the truth. Sam and Matt were held for a time aboard Sendak's ship but were later moved to an unknown location; Pidge became determined to find them after becoming a Paladin of Voltron.
In The Prisoner, Pidge and Matt receive a lead on their father's location in a prisoner formerly under Lotor's control. However, by the time they arrive, Sam had already been moved, presumably by Acxa, Ezor and Zethrid and taken to Zarkon, who offers him to the Paladins in exchange for Lotor.
During the exchange, Pidge runs ahead to greet her father, only to discover that he is a hologram, and the real Sam still in Zarkon's custody, who demands they hand over the Voltron Lions. Lotor breaks free and attacks Zarkon, allowing Pidge, Matt and Shiro to pursue Acxa, Ezor and Zethrid and rescue Sam, finally reuniting with his son and daughter.
Following his rescue, Sam is cleaned up on Olkarion and talks of returning to Earth and is saddened when Pidge and Matt resolve to stay and continue their fight against the Galra. After helping repel a Galra attack, Sam accepts that his children are where they need to be and gives them his blessing. He bids his children goodbye and returns to Earth with a report of the war on the Galra so that Earth can ready itself for battle as well as messages for Hunk and Lance's families.