*NOTE : Not A Krycek Episode But Nick's First X-Files Appearance.

.

Season 2

Episode #04 : Sleepless
Episode #05 : Duane Barry
Episode #06 : Ascension
Episode #25 : Anasazi

.

Season 3

Episode #01 : The Blessing Way
Episode #02 : Paper Clip
Episode #15 : Piper Maru
Episode #16 : Apocrypha

.

Season 4

Episode #09 : Tunguska
Episode #10 : Terma

.

Season 5

Episode #13 : Patient X
Episode #14 : The Red and The Black
Episode #20 : The End

.

Season 6

Episode #12 : Two Fathers
Episode #13 : One Son
Episode #23 : Biogenesis

.

Season 7

Episode #02 : The Sixth Extinction II Amor Fati
Episode #23 : Requiem

.

Season 8

Episode #15 : DeadAlive
Episode #20 : Essence
Episode #21 : Existence

.

Season 9

Episode #19 & #20 : The Truth