Here's Mackenzie on "I'm Telling" (https://www.youtube.com/watch?v=nngJZ8_q-fM), the Nickelodeon game show; this was a celebrity edition, pitting Mack and his brother Sean against Shannen Doherty and her brother (also Sean) as well as Heidi Zeigler and her brother (who sadly is not named Sean).

This episode aired Feb 6, 1988, according to IMDB (https://www.imdb.com/title/tt0609628/?ref_=nm_flmg_slf_1).

Here's Mackenzie on "I'm Telling" (https://www.youtube.com/watch?v=nngJZ8_q-fM), the Nickelodeon game show; this was a celebrity edition, pitting Mack and his brother Sean against Shannen Doherty and her brother (also Sean) as well as Heidi Zeigler and her brother (who sadly is not named Sean).

This episode aired Feb 6, 1988, according to IMDB (https://www.imdb.com/title/tt0609628/?ref_=nm_flmg_slf_1).

Wow nice find Retro