Jay L. Clendenin / Los Angeles Times
Where you've seen her: She spent six seasons playing Dr. Allison Cameron on "House, M.D." and appeared as a scheming activist on the sixth season of "How I Met Your Mother."
Character on this show: Morrison will play 28-year-old bail bond collector Emma Swan, who's reunited with the child she gave up as a teenager. The now-10-year-old boy lives in a town called Storybrooke, where fairy-tale characters live but seem to have forgotten their fantastical identities.
Character similarities: Not too many. Morrison's new character diverges from her ethical and idealist persona on "House" and her quasi-diabolical character on "How I Met Your Mother" as she struggles with being a mom and fighting evil witches.