Todhunter is played by Robert Bathurst.
Todhunter was, until his death, a high-ranking officer aboard the mining ship Red Dwarf. He was married with children, but used to fool around with women, as Lister told Kochanski. According to Kochanski, the Todhunter of her parallel dimension was gay, although she might have told this to distract Lister from his claustrophobia (RD7: Duct Soup).
Frank Todhunter was resurrected by the nanobots who rebuilt Red Dwarf, but although he is referred to, he does not appear in Series VIII.