It seems Alasdair is in the The New Book of Knowledge
Annual Encyclopedia for 1986...
"Getting 'slimed' is all in a day's work for Alasdair
Gillis of Ottawa, Canada -
he's a star on the cable TV show 'You Can't Do That on Television.' The show,
a comedy series for kids, is filled with non-stop skits and gags (including
the slime, which can pour down on any cast member). Alasdair won a spot on
the show through a school audition in 1982. In 1985, at age 14, he became
the show's host. Rehearsing and taping the show keeps Alasdair busy every
day after school and full-time in summer."