"First Officer's Log, supplemental. Somehow Sisko, Dax, and Bashir have altered Earth's history. We have no choice but to send an away team into the past to try to find them and correct the changes to the timeline. The only problem is, we're not exactly sure where to look, or when."
"First Officer's Log, supplemental. Upon returning to the present, we were relieved to discover that the timeline had been restored."