He was also the partner of Dr. Hightower, the Juergens' pediatrician (which was how he learned about Amy's pregnancy).
He was shown to be overprotective of Grace and was a strong believer in "no sex until marriage." He used to take trips to Africa to help sick people.
Marshall admitted to Ricky Underwood that his brother was sexually abused by his next-door neighbor and he later committed suicide.
In the season 2 premiere, he is killed in a plane crash. Grace blames herself for the accident because she had sex with her boyfriend Jack Pappas after Marshall told her not to do it.
Marshall's body was later cremated.
While in Zimbabwe he had an affair and had a son named Jacob.
- Grace said her father waited to get married until he was out of medical school. ("Falling in Love").