J. Carroll Naish guest stars as Jeannie's great-grandfather, Bilejik the Djinn. Upon learning that Tony (Larry Hagman) is involved in an experiment to extract fresh water from salt water, Jeannie (Barbara Eden) summons forth Bilejik, who invented the same process back in ancient times. Of course, the formula that the old Djinn comes up with has a very strange taste--and effect. ~ Hal Erickson, Rovi