Blaming the Flash for his defeat, Thawne became obsessed with "replacing" Barry and traveled back in time to exact his revenge. Iris West rejected his romantic pursuits, so Thawne killed Iris. After Barry had found love again, Thawne threatened to kill Fiona Webb (Barry's fiancée) on their wedding day. Fearful that history was repeating itself, Barry killed Thawne by breaking his neck.