JAG season 9 episode 15
Episode title: Crash
The crash of an aircraft into an aircraft carrier is believed to be the result of the pilot committing suicide, which has Harm & Mac squaring off against one another; especially as Mac wants to hold the pilots commanding officer responsible when she learns he knew the pilot was deeply depressed before the pilot took off. When Mattie gets in over her head, she needs Harm & Petty Officer Coates to help her get out of it.
