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Suspicious of the motives behind Rainbow Dash's actions, Applebloom rallies the Cutie Mark Crusaders and sets out to uncover the truth.  Their means of finding that truth, however, lead to more insight on Rainbow Dash than they asked for. {Sequel to Caught in the Act}

(Can be read without reading the previous installment, but it is recommended that you read Caught in the Act first)

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Long before the invasion of Canterlot, a certain malevolent queen kept close watch on Equestria's most important ponies.  After their astonishing victory against Night Mare Moon, Queen Chrysalis busied her Hive with spying on and studying the Elements of Harmony.  

After receiving a slightly warped and partially abridged report on Fluttershy's heroic defeat of the dragon whose smoke clotted the skies above Ponyville, Chrysalis demanded more accurate reconnaissance to assess the full capabilities of this pegasus brave-heart.  Due to the intimacy and intricacy of the mission, she had decided to send in Raze, confident in his ability to sustain a facade and gather information.  She did not, however, count on a second, unauthorized changeling following him.  

List of Playing the Spy Game fics:

Belligerent Bounties of Boast Busting

Changelingshy

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Ever since the catastrophe in Ponyville, Trixie's life has been nothing but miserable.  She isn't respected as a performer, can't legitimately hold down any other sort of job, and has made enemies in all the wrong places.  Now, out of house and home, she begins to strongly consider simply ending it all.  Until she meets a mentally disabled single mother who teaches her that life is all about pushing through to the end.  This is the tale of their trials and discoveries in the city of Manehattan.  This is the story of how Derpy Hooves brought hope back to the heart of the Great and Powerful Trixie.  (Credit to fongsaunder on DeviantArt for cover art.)

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After keeping their secret so carefully hidden for so long, the cat is is officially out of the bag on Applejack and Rainbow Dash when Spike just happens to wind up at the wrong place at the wrong time.  Exposed and ashamed, Applejack and Rainbow Dash try to duck out of the public eye as the news spreads like wildfire.

(Possible spoilers in comments, read at your own risk)

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Long before the invasion of Canterlot, a certain malevolent queen kept close watch on Equestria's most important ponies.  After their astonishing victory against Night Mare Moon, Queen Chrysalis busied her Hive with spying on and studying the Elements of Harmony.  

When the perfect opportunity to evaluate Twilight Sparkle arose, Chrysalis took action, sending a veteran commando by the name of Raze to infiltrate Ponyville.  His assigned guise, however, wasn't one he expected.  

List of Playing the Spy Game fics:

Belligerent Bounties of Boast Busting

Changelingshy

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Have you noticed how she's been acting lately?  I know she can be radical sometimes, but this is getting out of hoof.  The way she behaves around them... I don't see anything wrong with those four, but she doesn't trust them.  Refuses to trust them.  There's something suspicious going on here, and her secrecy is only making things worse.  I just can't fathom what she doesn't like about the embassy.  After all,  they've done nothing wrong, and they're plenty nice.  She just can't see that, is all.  (Credit to Fuutachimaru on DeviantArt for cover art.)