[1] The NCIS team investigates the murder of a man found dead at Patuxent River Station by his wife who had just returned from six months at sea on a deployment.
After discovering the man had a $100 bill that has not been put in circulation yet, they team up with very abrupt and bossy Secret Service Agent Winter to find the rest of the money.
They discover that the bills belonged to a batch that was scheduled to be destroyed, the employee stole them by throwing them in with the regular trash in preparation for when they entered circulation but sold them to his bar friend for quick cash.
Tracking the garbage truck to the landfill used at the time, They learn the theft occurred the night Navy SEALs killed Bin Laden.
Tony gets irritated with his father trying to force things by making up for so many missed Christmases in one go, but eventually kicks him out after catching him in bed with a neighbor.
[3] Executive producer Mark Horowitz "was a single man for a long time, and [...] lived very much like this for a number of years", which also is the "theme" for Tony's apartment.
"Years ago we heard the Treasury Department would be putting them out in 2011 and, when that didn’t happen, we researched their fate and thought it would make an interesting story if our NCIS team came across a hundred-dollar note before it was supposed to go public".