help with an older tv movie

I remember seeing a 2 night tv movie (4 hrs. total, I believe) probably about 25 or more years ago that possibly had Lindsay Wagner in it (tho cannot find anything in wikipedia or other so far on this)… believe it was called Watchers (& only thing I’m finding with that has to do with the movies based on Dean Koontz’s book…not the same premise at all)… believe the lead character had a near death experience, surviving… remember something about a pool/ possible drowning… long ‘tunnel’ where ‘people’ or somethings trying to pull the death victim away… back in the ‘real world’ she kept being hunted by watchers to pull her back to this death tunnel or whatever… have tried and tried, but have had no luck in this movie…cannot remember if it was on CBS or ABC or NBC…can anyone help? thanks! I am at library as have no home internet, tho do have basic & e-m access thru my phone. Feel free to e-m me or post if anyone has an idea or suggestion…thanks again!

Nice catch!