[2] She is a frequent guest star on various television programs, including a recurring role on CSI: Crime Scene Investigation, playing serial felon Tammy Felton in the first and second seasons.

In 1999, Brannagh guest starred on a season 2 episode of the TV series Charmed ("That Old Black Magic") as an evil witch named Tuatha.

In 2003 Brannagh played the part of "Ruby" in the Star Trek: Enterprise episode "First Flight".

In 2007, she landed a role in the Lifetime series Army Wives, in which she portrayed Pamela Moran for six seasons until Spring 2012.

[2] Soon after leaving Army Wives, Brannagh joined the cast of the proposed ABC drama series Gilded Lillys as Elizabeth, the matriarch of the Lily family.