Morrow joined the crew of HBO Western drama Deadwood as a writer for the second season in 2005.
The series was created by David Milch and focuses on the growth of a settlement in the American West.
[1] Morrow and the writing staff were nominated for a Writers Guild of America (WGA) Award for Outstanding Drama Series at the February 2006 ceremony for their work on the second season.
Morrow and the writing staff were nominated for the WGA Award for Outstanding Comedy Series at the February 2009 ceremony for their work on the fourth season.
She wrote the teleplay for the third-season episode "Sacrament" from a story by Coleman Herbert.