did anyone see this show? i think on discovery channel?

ok a couple months ago i saw this show on tv i think it was discovery but not sure..i cannot remember the name.i tried googling "my shocking story" "stories of survival" and "i shouldnt be alive" (which are all real shows) but couldnt find the description (on the shows websites) of the episode i saw... it was 3 different people telling their true life story of surviving terrible events....one was about a woman who was attacked and left for dead by the railroad killer...another was about an elderly couple--a train derailed near their farm and dangerous chemicals contaminated the entire area by their home and they couldnt escape for hours and hours...the last was about a woman who was driving down the highway and crazy people on meth forced her to pull over and they tried several times to kill her, but she didnt die although they thought she was dead.........anyway what was this show called? i swear it was one of the ones i mentioned above but...i searched on the DVR for all the titles i thought it mightve been but didnt find any episodes matching