9×7 A Christmas Peril
Mulder’s life is threatened over Christmas
Rating: PG
Classification: MSR, A, MT.

10×10 Christmas Special
Seven holiday episodes
Rating: PG-13
Classification: Case Files

11×8 Christmas Special
Four holiday webisodes
Rating: PG-13
Classification: Case Files

12×7 Kenneth
Mulder gives a man some Christmas help
Rating: PG-13
Classification: Casefile

12×7 Christmas Special
Two jingling webisodes
Rating: PG-13
Classification: Case Files

13×5 Christmas Special
Three red and green webisodes
Rating: PG-13
Classification: Case File

14×5 An X-Mas Carol
Weeping Santa, amnesia, Man in Black
Rating: PG-13
Classification: Holiday, Case File

14×6 Christmas Special
One new webisode + Christmas past
Rating: PG-13
Classification: Case Files

14×7 Silent Night, Painful Sight
A trip to the forest during Christmas
Rating: R
Classification: Case File, MSR, A, MT

15×6 Christmas Special
Two holiday webisodes
Rating: PG-13
Classification: Case Files

16×3 Spero Novus
A hostage situation on Christmas
Rating: PG-13
Classification: Case File, X-mas Special

17×1 Christmas Special
Three X-mas files webisodes
Rating: PG-13
Classification: Case Files, Holiday

18×3 The Guests
Hitchcock stars in a holiday tale of aliens…
Rating: PG-13
Classification: Case File, MythArc