said , `` And that 's how I met your Aunt Robin . '' ` `` Let 's Go To The Mall '' ? executives promise to introduce mother character . Carrie Underwood , Stacy Keibler and Stacy Keibler all cast in First episode . Instinct tells writer that Rachel Bilson is too obvious a choice .
` `` Let 's Go To The Mall '' ? executives promise to introduce mother character . Carrie Underwood , Stacy Keibler and Stacy Keibler all cast in First episode . Instinct tells writer that Rachel Bilson is too obvious a choice .