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Written by Jack Elinson and Charles Stewart, "Barney's Replacemnt" finds Deputy Barney Fife exhibiting jealousy towards Bob Rogers (Mark Miller), a go-getting rookie lawman from the state attorney's office. Convincing himself that Sheriff Andy intends to hire the super-efficient Bob as his replacement, Barney quits his job to become a door-to-door vacuum cleaner salesman. It is up to Andy to prove how much Barney is truly needed. Originally broadcast on October 9, 1961, "Barney's Replacement" was the first episode filmed for The Andy Griffith Show's second season, though not the first one shown.