On the September 23rd ep in 1966 -
1966: Ep #65 - Vicki wonders if Burke has come to accuse
Roger of being involved in Bill's death. - but by September 23rd of 1968 -
1968: Ep #586 - Adam attacks Vicki. - so I bet by 1968 Vicki only wished her problems were as simple as whether or not someone believed someone else might be involved in a death...