Episode 01: Tourist Trapped
ZHOFRPH WR JUDYLWB IDOOV
WELCOME TO GRAVITY FALLS

Episode 02: The Legend of the Gobblewonker
UHWXUQ WR EXWW LVODQG
RETURN TO BUTT ISLAND

Episode 03: Headhunters
KH'V VWLOO LQ WKH YHQWV
HE'S STILL IN THE VENTS

Episode 04: The Hand That Rocks the Mabel
FDUOD, ZKB ZROW BRY FDOO PH?
CARLA, WHY WONT YOU CALL ME?

Episode 05: The Inconveniencing
RQZDUGV DRVKLPD!
ONWARDS AOSHIMA!

Episode 06: Dipper vs. Manliness
PU. FDHVDULDQ ZLOO EH RXW QHAW ZHHN. PU. DWEDVK ZLOO VXEVWLWXWH
MR. CAESARIAN WILL BE OUT NEXT WEEK. MR. ATBASH WILL SUBSTITUTE

---cipher change---

Episode 07: Double Dipper
KZKVI QZN WRKKVI HZBH: "ZFFTSDCJSTZWHZWHZWFS!
PAPER JAM DIPPER SAYS: "AUUGHWXQHGADSADSADUH!

Episode 08: Irrational Treasure
V. KOFIRYFH GIVNYOVB
E. PLURIBUS TREMBLEY

Episode 09: The Time Traveler's Pig
MLG S.T. DVOOH ZKKILEVW
NOT H.G. WELLS APPROVED

Episode 10: Fight Fighters
HLIIB WRKKVI, YFG BLFI DVMWB RH RM ZMLGSVI XZHGOV
SORRY DIPPER, BUT YOUR WENDY IS IN ANOTHER CASTLE.

Episode 11: Little Dipper
GSV RMERHRYOV DRAZIW RH DZGXSRMT
THE INVISIBLE WIZARD IS WATCHING

Episode 12: Summerween
YILFTSG GL BLF YB SLNVDLIP: GSV XZMWB
BROUGHT TO YOU BY HOMEWORK: THE CANDY

Episode 13: Boss Mabel
SVZEB RH GSV SVZW GSZG DVZIH GSV UVA
HEAVY IS THE HEAD THAT WEARS THE FEZ

---cipher change---

Episode 14: Bottomless Pit!
14-5-24-20 21-16: "6-15-15-20-2-15-20 20-23-15: 7-18-21-14-11-12-5 '19 7-18-5-22-5-14-7-5
NEXT UP: "FOOTBOT TWO: GRUNKLE'S GREVENGE."

Episode 15: The Deep End
22-9-22-1-14 12-15-19 16-1-20-15-19 4-5 12-1 16-9-19-3-9-14-1
VIVAN LOS PATOS DE LA PISCINA
(spanish for 'LONG LIVE THE POOL DUCKS')

Episode 16: Carpet Diam
2-21-20 23-8-15 19-20-15-12-5 20-8-5 3-1-16-5-18-19?
BUT WHO STOLE THE CAPERS?
**BONUS!** - A book titled "Why am I sweaty" has a caesar cipher on it. It reads:
SXEHUWB LV WKH JUHDWHVW PBVWHUB RI DOO DOVR: JR RXWVLGH DQG PDNH IULHQGV
PUBERTY IS THE GREATEST MYSTERY OF ALL ALSO: GO OUTSIDE AND MAKE FRIENDS

Episode 17: Boyz Crazy
8-1-16-16-25 14-15-23, 1-18-9-5-12?
HAPPY NOW, ARIEL?

CIPHERS:
---------------------------------------------------------------------------------------------------
Episodes 1-6 (Caesar Ciper - three letters back)
Cryptogram  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
Meaning     X  Y  Z  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  
---------------------------------------------------------------------------------------------------
Episodes 7-13 (Atbash cipher - reversing the letters
Cryptogram  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z
Meaning     Z  Y  X  W  V  U  T  S  R  Q  P  O  N  M  L  K  J  I  H  G  F  E  D  C  B  A
---------------------------------------------------------------------------------------------------
Episodes 14+ (Gematria cipher)
Cryptogram  1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26
Meaning     A  B  C  D  E  F  G  H  I  J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z
---------------------------------------------------------------------------------------------------