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|First Appearance:||Mr. Kiss and Tell|
|Last Appearance:||Years, Continents, Bloodshed|
|Occupation(s):|| Balboa County Sheriff
Army Brigadier General with CID (former)
|Family Members:||Bobby "Tauntaun" Langdon (brother)|
|Portrayed By:||Dawnn Lewis|
Marcia Langdon is a former Army Brigadier General who, after returning to her hometown of Neptune following her retirement and discovering the corruption present in the Balboa County Sheriff's office decides to run against then incumbent Sheriff Daniel Lamb.
Marcia Langdon grew up on Neptune, California during the late 1970's and early 1980's. Her father, Mr. Langdon had vanished to parts unknown by the time she was 17 and her mother was a soft-spoken but anxious woman who worked in a garment factory on the edge of town. Marcia's older brother, Bobby "Tauntaun" Langdon, was a football star at Neptune High, but eventually became involved in small time crime after graduation.
The Langdon family lived three doors down from Keith Mars when he was first hired as a Deputy by the Balboa county's Sheriff's Department, and he and Marcia developed a friendship while she was in high school, despite the fact that as an avid JROTC member, socially maladroit and a teacher's pet she was substantially different than he was.
The Summer after Marcia's senior year in high school she found fifteen kilos of coke in her brother's closet while she was hanging up his laundry and called the sheriff on him, leading to his arrest and eventual death in prison. Marcia's mother kicked her out of the house the night of her brother's arrest.
Afterwards, Marcia went to UCLA on a ROTC scholarship. She climbed up the ranks of CID eventually holding command during the last seven years of her 30 year career in the U.S. Army. She was awarded the Legion of Merit, the Meritorious Service Medal, the Defense Distinguished Service Medal, the Defense Superior Service Medal and the Bronze Star Medal.
Following her retirement Marcia moved back to Neptune. However, unable to sit back and watch her hometown become synonymous with "miscarriage of justice" she decided to run for Balboa County Sheriff against the incumbent Daniel Lamb. She wins the election by fewer than two hundred votes becoming Balboa County's new Sheriff.