CBS

In it, Future Ted imagines himself running through the streets before knocking on the mother's apartment door. Ted introduces himself, telling her how much he loves her, that they will meet in 45 days, and he would give anything to spend that extra time with her. It foreshadows that he would do anything to have extra time with her because, for Future Ted, the mother had already died at that point in time.

– daniellee4a03cf0f6