Love this show, I used to watch it when it was airing and I have to say it stands up to time. Unfortunately, the suspension of disbelief is pretty shot in this one due to the time period of 1938. What makes it more odd is they've had cases as old or older that have been solid episodes, they worked in children or grandchildren who wove the pieces together and it was an interesting plot line reaching that far back.
This time they biffed it. The episode is centered on Orson Well's War of the Worlds radio show, hence the 1938 setting. With the show taking place in 2007 (let's just round and say 70 years later), this presents an obvious problem which they had worked around fine before. This time, all the actual subjects were part of the show. The son, conservatively born in 1930, looks pretty spry for 77. The husband and the love interest, both grown men with careers and kids, would have been born in 1930, again if we're erring generous. The husband, while described as having Alzheimer's, doesn't appear to be frail at all and is mobile at ~98 years old. The love interest, presumably the same rough age, is met out having lunch on his own and is in better shape than my grandfather (who died at 87).
The plot itself is fine but I found myself throughout the entire episode doing math and saying "come on, no way". Maybe also worth mentioning that two episodes later, a father of a teenage victim from the mid 60s looks more frail than any of them and is in a nursing home. Sad swing and a miss here.