Adam Knight

Season 1

 * 1x6
 * 1x9
 * 1x11
 * 1x12
 * 1x14
 * 1x16
 * 1x17

Season 3

 * 3x8
 * 3x11
 * 3x12
 * 3x14
 * 3x15
 * 3x16
 * 3x19
 * 3x20
 * 3x21

Season 4

 * 4x19

Season 5

 * 5x4
 * 5x5
 * 5x8
 * 5x9
 * 5x10
 * 5x11
 * 5x13
 * 5x14
 * 5x16
 * 5x17
 * 5x19
 * 5x22
 * 5x23

Season 6

 * 6x1
 * 6x2
 * 6x4
 * 6x6
 * 6x9
 * 6x13
 * 6x14
 * 6x15
 * 6x16
 * 6x17
 * 6x18
 * 6x19
 * 6x21
 * 6x23

Season 7

 * all episodes except 7x5, 7x7, 7x11, 7x12 and 7x21

Season 8

 * all episodes except 8x6

Season 9

 * 9x1  (flashback) 
 * 9x2  (in the form of Illyrian and dream) 
 * 9x7  (in the form of Illyrian) 
 * 9x9  (flashback) 
 * Magical History Lesson - 9x12 (flashback) 
 * 9x16  (alternate universe) 
 * 9x19  (resurrected and split from illyrian) 
 * 9x20
 * 9x21
 * 9x22
 * "Till Charmed Do Us Part (Part 1)" - 9x23 
 * "Till Charmed Do Us Part (Part 2)" - 9x24 

Trivia

 * Originally Adam Knight was not going to be split from Illyrian and brought back. But it was fan outcry and the potenial to see both Adam and Illyrian interact. But the time the story came together where Adam was to be brought back, the series wrapping up and running out of time. It was decided that Illyrian would be killed off during episode 9x20, along with another major character. When Illyrian dies, some of Illyrian's powers transfers into Adam, however the powers are short lived and he losses them completely during the series final.
 * The character of Adam Knight was not originally suppose to return after the first season, but when they were developing a new love interest for Johnny, the character read like Adam and they decided to bring him back.
 * When Adam broke up with Johnny over the Wicca secret, the intention was for him to return and reunite with him, but the actors new project meant his role in the series was cut short, and he only made one appearance in season 4. When the actors project was canceled, the writers brought Adam back for season 5, and eventually he was upgraded to regular during season 6.
 * Adam and Johnny's relationship is the second longest and major relationship on the series second to James and Katherine.
 * Adam and Johnny are the second couple to marry on the series after James and Katherine during season 6, they both wed in season 8 episode 17.
 * In the flashforward both Adam and Johnny have adopted two twins sons.
 * In the revival series during 2019 and 2020, Adam now runs the business.