This is a Third-party Addon.
Please use carefully on data that is backed up, and help make it better by reporting any comments or problems to the author, or issues to the bug tracker
The Timeline Pedigree View shows a pedigree and also the timeline for each person's life. The Timeline Pedigree View displays descendants as well as ancestors.
When a marriage does not have a date, then the actual marriage will not show as connecting lines on the view.