In 1975, Nashville had only 4 stations over the air on TV. The city's now Fox station WZTV-17 was off the air after an initial unsuccessful run as WMCV from 1968-71. In 1976, channel 17 would come back on the air as the newly christened WZTV owned by Reel Broadcasting and would establish itself as a pioneer in Nashville TV as the city's first UHF station. Its success in the 1980's created UHF competition between it, channel 39 WFYZ out of Murfreesboro (now a religious outlet WHTN) and channel 30 WCAY-TV (which is now one of WZTV's two sister stations WUXP My30 and the city's most recent station  WNAB CW 58) I mentioned this because I thought that's what the unknown station was. The three stations are all now owned by Sinclair.
In terms of the special The City That Forgot About Christmas, lots of familiar names in the cast. Charles Nelson Reilly, Sebastian Cabot (Family Affair), comedian Louis Nye Casey Kasem and Don Messick (ZOINKS...Shaggy and Scooby Doo). The special was produced by The Lutheran Church.
Round of golf in Buffalo Grove in Chicago? Do you mean the Buffalo Grove Golf course in Buffalo Grove? That's pretty cool because I live right on the border of the course. It's in danger of being reduced from 18 holes to 9 because they want to create a "downtown" there.
Another of the voices was Corinne Orr, aka Trixie, Spritle, and all the female voices from Speed Racer. IMDB lists the original Japanese title as Andersen Monogatari with an 80-minute running time, or ten minutes longer than this one.