That Copperfield special was interesting. I looked at the credits and IMDB to see if the studio stuff was shot in Canada but didn't find anything. I noticed some Canadian actors aside from Lynne and guest Eugene Levy. Without looking closer I saw Michael J Reynolds. The show was directed by long time CBCer Ron Meraska. I also noticed 1983 was still old school TV, they were keying in graphics cards for the voice over commercials at the end.
Doing some research on Meraska (who I thought also did HNIC) I found an interesting article on Lorne Michaels by Kliph Nesteroff. It posits that SNL was derived from the CBC's The Hart and Lorne Terrific Hour. Hart of course was lawyer Hart Pomerantz (brother of Hollywood Canadian writer Earl Pomerantz: MTM, Taxi, Cheers) and famous for This is The Law a noted Canadian panel show of the 70s.
Nesteroff has written some interesting off beat stuff including some celebrity interviews that go into the inside story. For instance I always wanted to know what happened to my favourite hockey announcer growing up, Bill Hewitt. Nesteroff lays out the story.
Live from Another Country
How the CBC blew its chance to create Saturday Night Live
Kliph Nesteroff thewalrus.ca April. 8, 2020
Foster's Shadow: The On-Air Meltdown of Bill Hewitt
Kliph Nesteroff WFMU's Beware of the Blog July 17, 2011