Brett Cullen appeared as wounded G.I. Private McKegney in Season 10 of the "M*A*S*H" TV series.
|Birthname||Peter Brett Cullen|
|Born:||August 26, 1956|
|Birthplace||Houston, Texas, U.S.|
|Episodes appeared in:||"Blood and Guts" (Season 10)|
|Character played:||Private Thomas Anthony McKegney|
Cullen was born in Houston, Texas, to Lucien Hugh and Catherine Cullen. In 1974, he graduated from Madison High School, . which was soon followed by a graduation from the University of Houston, which helped give great credit to his acting mentor and university professor, Cecil Pickett, who also mentored many other Houston-born actors.
He would soon later start his acting career by portraying Dan Fixx in the 1980s CBS drama series Falcon Crest, staying on the role for two seasons. He also played Marshal Sam Cain in the ABC-produced Western series The Young Riders for a single season. In 1980, he appeared as the second Gideon Chisholm in the last nine episodes of the CBS Western miniseries The Chisholms. Cullen also became the lead actor of the short-lived series Legacy, starring as Ned Logan for the duration of the show's one season. On the series The West Wing, he played Ray Sullivan, a fictional former State Attorney General and governor of West Virginia and the Republican nominee for Vice President.
Brett's guest appearances on TV throughout his career include The Incredible Hulk, Tales from the Crypt, M*A*S*H, V, Matlock, Star Trek: Deep Space Nine, Ally McBeal, Walker, Texas Ranger, Once and Again, Without a Trace, Cold Case, The Mountain, Monk, CSI: Miami, NCIS, Desperate Housewives, Pepper Dennis, Lost, Ghost Whisperer, Private Practice, Ugly Betty, and Friday Night Lights. In 2009, he had a recurring role in the ABC Family TV series Make It or Break It. 
He also played one of the CAPCOMs in the feature-film Apollo 13 and real-life astronaut David Scott in the HBO-produced miniseries From the Earth to the Moon. In 2011, he played the stepfather to Selena Gomez's character in the romantic-comedy film Monte Carlo, and in the following year, he appeared as a Congressman in the Batman film The Dark Knight Rises. Cullen also portrayed Tom Eckert, the father of protagonists Jed and Matt, in the remake of the 1984 film Red Dawn.
Cullen portrayed sociopathic Christian preacher, murder suspect, and attempted murderer Justin Mills in the two-part Season Nine finale episode of ABC-TV's Criminal Minds TV series.