On Friday, April 5, "The Young and the Restless" stars Melody Thomas Scott (Nikki Newman), Peter Bergman (Jack Abbott), Doug Davidson (Paul Williams), Lauralee Bell (Christine Williams), Jeanne Cooper (Katherine Chancellor), Jess Walton (Jill Abbott), Joshua Morrow (Nick Newman) and Michelle Stafford (Phyllis Summers Newman) are scheduled to appear on Hallmark Channel's new series "Planet 360" in celebration of "Y&R's" 40th anniversary, which will air on Tuesday, March 26 on CBS.