
to SPY on Amy and her date.
The Big Bang Theory Season 9, Episode 8

to SPY on your fiancée.
The Big Bang Theory Season 12, Episode 12

Of course, a SPY would deny being a SPY.
Game of Thrones Season 2, Episode 6

What if he's a SPY?
What if he's in a Beatles cover band?
The Big Bang Theory Season 8, Episode 20

Sheldon, how could you just sit there
and let them SPY on me?
The Big Bang Theory Season 2, Episode 1