On this episode of "TMZ: Bankruptcy Scene Investigators" ... former "CSI" star Gary Dourdan throws in the towel and files for Chapter 11.
The troubled actor filed papers on August 30th -- and according to the docs, has a little over $1.8 mil in assets ... but is in the hole to his creditors to the tune of $1.73 mil.
A large chunk of that debt -- $1,689,704 million -- is owed to various banks, including Union Bank, which apparently holds the mortgage on his home that may be in default.
As for his assets -- $200 cash, $3k in a bank account, $4k in furniture, $200 worth of books, $1,500 in clothes, $500 in watches ... oh and a 2006 Dodge Charger worth $7,000.
Here's the kicker ... Gary says his disposable income is only $321 a month ... claiming his bills ($14,562 a month) eat up just about all of the $14,883 he pulls in on average.
The good news ... the actor says he "anticipates major acting roles" in the future ... which can help pay off his debt.