Erin Jessica Cahill (born January 4, 1980) is an American actress. She is best known for her roles as Jen Scotts in Power Rangers Time Force,[1] Ted Mosby's sister, Heather, in How I Met Your Mother, and Kendra Burke in Saving Grace. She had a recurring role as Felicity in the ABC series Red Widow. She is also noted to be the first lead female character for the Call of Duty franchise, as Chloe '*****' Lynch in Call of Duty: Black Ops II. Passionate about charity, Cahill co-founded the group, Charitable Living, which services the local community throughout the year with various fundraisers and days of volunteering. In May 2015, Cahill joined non-profit group BuildOn and traveled to Malawi to promote education and build schools.