We all assumed that Barnabas had successfully saved Vicki and Peter from the gallows in 1796 when he willed himself back there (with the help of Peter's ghost). Unfortunately the happy ending we assumed Vicki and Peter had was ruined when DC threw in that stupid twist of [spoiler]Vicki being killed by Jeb Hawkes during the Leviathan story.[/spoiler]
Something just occured to me....Barnabas ended up going back to 1796 a second time after 1897 when [spoiler]he followed Kitty into Josette's portrait. The Leviathans snatched him in 1796.[/spoiler] Now this was the time that, when Vicki went back to the past after the seance of 1967, at this point of 1796 she was jailed as a witch. Did Barnabas' second trip back to 1796 unintentionally winded up screwing up Vicki and Peter's happy ending?
Also Millicent's convenient knowledge that Barnabas had 'died' contradicts how in the original 1795 storyline, she had been led to believe Barnabas had gone to England. Also she was too preoccupied with Nathan Forbes and his betrayal on the night of Josette's trip to Widows' Hill.