Goosebumps

Degrassi
The blonde kid in a black shirt selling cake at the bake sale in "Calling All Creeps" appears years later with long hair and glasses in several episodes of the second season of "The Next Generation" including:
 * 22 September 2002 "When Doves Cry Part 1" the mullet Paige is compared to
 * 29 September 2002 "When Doves Cry Part 2" behind JT while he waits at the mall for Paige
 * 01 December 2002 "Don't Believe the Hype" at the cultural festival
 * 17 January 2003 "Message in a Bottle" entering the party
 * 19 January 2003 "Dressed in Black" walking in front of Toby before he gives JT condoms
 * 02 February 2003 "Fight for Your Right" in the computer room watching Emma's speech at end

3 January 2003 "Careless Whisper" has Destiny doing hacky sack but not Amullet