TV Who Killed Harold Holt? Who Killed Harold Holt? /10 by 0 users Who Killed Harold Holt? was a television special which explored the disappearance of former Australian Prime Minister, Harold Holt. Broadcast on 20 November 2007 on the Nine Network, and hosted by Ray Martin, the special coincided with the 40th anniversary year of Harold Holt's disappearance. The special managed disappointing ratings for its 9:30 - 10:30 timeslot, achieving only 934,000 viewers nationally. Details Casts Posters Images Title Who Killed Harold Holt? Alternative Titles First Air Date Last Air Date Number of Episodes 0 Number of Seasons 0 Genres Documentary, Networks Nine Network, Casts Plot Keywords ,