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Robert F. Logan, Jr. (born May 29, 1941) was an American actor who appeared in numerous films and television programs, the most notable of which were a very successful series of family adventure movies in the 1970s.

Born in Brooklyn, New York, Logan was the eldest of seven children born to bank executive Robert Senior. Young "R.J." was active in high school sports; he received a baseball scholarship to the University of Arizona at Tucson. There he was spotted by a Warner Bros. talent agent. Logan is recognized by many for his roles in family-oriented films such as the Wilderness Family film series.

From 1961 to 1963, Logan played J.R. Hale, the young valet parking attendant on ABC's 77 Sunset Strip. Logan succeeded the previous attendant, Kookie, played by Edward Byrnes, who in the story line became a full-fledged investigator. Then from 1965-66 Robert played the part of Jericho Jones an impetuous young man who for 13 episodes travelled around with Daniel Boone.

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