Why am I so glad I live in an area that doesn't pay much attention to preemptions?
The only spot that I know for sure was preempted was the 4 PM CBS slot. I can only remember from 1986, but I know that Press Your Luck didn't air at 4- I'm pretty sure WCBS had it on at 12:30 (with LMAD on before it).
Not sure if that was the case when Tattletales or Body Language was airing in the slot.
(For some reason, in 1987 I think that ABC might have been airing something at 10 AM, which was where WABC paired Jeopardy! with another one season wonder, Split Second- continuing the trend they had with Lange's Name That Tune, Sale of the Century (once they got it from WWOR), and the Rafferty CS. Can anyone confirm that?)