When the box carrying Zanaida is first opened, her oxygen mask is upside down (the tubing points upwards and the nose clip is by her chin). After cutting to Stan Beeman, in the next shot, the oxygen mask is on correctly.
After the server lists all the available beers, Philip orders two Millers. When he returns from scoping out the CIA table, he and Elizabeth are drinking Miller Lites.
When Philip and Elizabeth are in the bar, the waitress lists what beers are available. Several of those she lists, including Coors, Coors Lite, and Sierra Nevada, were not available in the Eastern US in 1982, when the episode is set.
The refrigerator in Philip's motel room has an Energy Star sticker. The story takes place in 1982, but the Energy Star program began ten years later in 1992.
During the establishing shot of Dulles Airport, the tail of moving jet is a United Airlines livery from 1993-1997, well after the 1980s time period of the show.