To make it even more bizarre, the astronaut in question is a woman! (Yes, it's sexist but I labor under certain archaic misconceptions.)
The juicy bits from BBC:
Navy Capt Lisa Nowak, 43, who flew to the international space station last July, was charged with attempted kidnapping, battery and other crimes.
She drove from Texas to Florida to confront Colleen Shipman, disguised in a wig and trench coat. (Presumably it was Capt Nowak and not Ms. Shipman who was disguised.)
Police said Capt Nowak drove 1,000 miles (1,600km) from her home in Houston to Orlando International Airport, wearing a nappy to avoid a toilet break.
The arrest affidavit says Capt Nowak then followed Ms Shipman in an airport bus.
Capt Nowak pursued Ms Shipman to her vehicle in the car park.
Ms Shipman locked herself in but rolled down the window when Capt Nowak began to cry, the affidavit says. Ms Shipman was then attacked with the pepper spray, it says. An officer followed Capt Nowak and she was stopped allegedly carrying the wig, an air rifle, a steel mallet and a knife.
While Nowak was initially charged with kidnapping and attempted battery, the charge was later upgraded to attempted murder.