Dennis Kerrigan
From Tardis Wiki, the free Doctor Who reference
Dennis Kerrigan was the father of Kerrigan and husband of Davina.
The Grel's Extra-Strong Fact-Removal Gas caused him to forget that Davina was his wife and, at some point after he found Fun Facts for Children: Volume S-T, he was captured and presumed dead. His son and Jason Kane eventually found him working as a slave in Dunstable where he was reunited with his family after Bernice Summerfield released a second wave of the gas. (AUDIO: The Grel Invasion of Earth)