The governor of Caldos II, a colony built as a re-creation of the Scottish Highlands, who hosts the Enterprise-D in 2370 while it repairs his weather control system.
Governor Maturin appears in the seventh-season episode Sub Rosa. He is not human, but he is plainly fond of the colony's Scottish character. He speaks at Felisa Howard's funeral and makes the visiting officers welcome.
He asks Picard for help with the ageing weather control and fusion systems, and Geordi La Forge and Data link them to the ship. The arrangement goes badly wrong when the entity Ronin uses the power transfer beam to move about, bringing storms and fog down on the colony.
Maturin is on hand as Ned Quint's death is investigated and as the truth about Ronin emerges. He was played by Michael Keenan.