ENGAGED. Barbara Walters, 53, aggressive, ingratiating celebrity interviewer as co-host of ABC's 20/20 and on her own fre-
quent specials; and Merv Adelson, 55, chairman
and co-founder of Lorimar, corporate
producer of such hit TIV series as Dallas,
Falcon Crest and Knots Landing; in Los
Angeles. The two have been dating for
more than a year. The marriage, sched-
uled for late fall, will be the third for both....