"" is the twelfth episode of the seventh season of How I Met Your Mother . It is widely considered one of the series' most emotional episodes due to its exploration of infertility and grief. Plot Summary
"How I Met Your Mother" Symphony of Illumination (TV ... - IMDb [S7E12] Symphony of Illumination
The episode breaks from the show's standard format by featuring as the narrator. She appears to be telling her two future children the story of how she met their father. "" is the twelfth episode of the seventh