O'Brien was a contestant on the ABC game show The Big Showdown in the mid-1970s, winning $5,000 for rolling "Show Down" during the timed dice roll round.
Burr also appeared as a contestant on two game shows, The Big Showdown (1975) and Wordplay (1987).
Two episodes also exist on videotape: the 1974 pilot and an episode from 1975 where Jim Peck falls while making his entrance down the stairs (which has made an appearance on The Most Outrageous Game Show Moments).
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His first hosting job came on the Ron Greenberg-produced hard quiz The Big Showdown, which ran on ABC from December 23, 1974 until July 4, 1975.
Storm Rider (Il Grande duello, 1972), aka The Grand Duel and The Big Showdown is a Spaghetti Western directed by Giancarlo Santi, who had previously worked as Sergio Leone's assistant director on The Good, the Bad and the Ugly and Once Upon a Time in the West.