to make Willie and the Yank (1967) for television, released theatrically as Mosby's Marauders. He had a role in The Love-Ins (1967) for Sam Katzman. His had a brief but memorable appearance in the Clint Eastwood movie Hang 'Em High as a preacher. Hawaii Five-O Hang 'Em High was written by Leonard Freeman, who was producing a new police procedural, Hawaii Five-0. Tim O'Kelly was originally cast as Jack Lord's assistant but test audiences thought he was too young, so MacArthur was given the role. MacArthur said the producer "told us, 'We can be a big hit. This is a morality play. It's good versus evil and the good guys are going to win.' That was during the Vietnam era, and I think many people were looking for something like that." MacArthur said Lord "said 'book him' to others in the cast, but I guess he said it to me the most. It wasn't anything we really thought about at first. But the phrase just took off and caught the public's imagination." Appearing in the show made MacArthur very wealthy. He invested much of his earnings in Hawaiian real estate. Bored with Hawaii Five-O, MacArthur left the show in 1979, one year before it ended. "It was just time," he said. "I called the producer from South America and told him I was heading down the Amazon River...." "I grew bored," he explained. "The stories became more bland and predictable, and presented less and less challenge to me as an actor." William Smith, who replaced him on the show, claimed MacArthur quit "because Jack Lord wouldn't let him have a dressing room. He had to change in the prop truck for eleven years." After Hawaii Five-O After leaving Hawaii Five-O, McArthur guest-starred on such television shows as Time Express, Murder, She Wrote, The Love Boat, Fantasy Island, Walking Tall, The Littlest Hobo, Vega$, and Superboy, as well as in the miniseries Alcatraz: The Whole Shocking Story (1980) and The Night the Bridge Fell Down (1983). He appeared in A Bedfull of Foreigners in Chicago in 1984 and in Michigan in 1985. He followed this with The Hasty Heart before taking a year out of show business. In 1987, he returned to the stage in The Foreigner, then played Mortimer in the national tour of Arsenic and Old Lace with Jean Stapleton, Marion Ross, and Larry Storch. In 1989, he followed