The Seaview is placed on nuclear war alert.
Another reviewer (Mark Phillips) once sort of compared this episode to the 1960s motion picture: Fail Safe. The two productions have a few things in common with the very realistic procedures involved in a war alert put on display.
But do I want all this in Voyage? At first my answer was no. But after four screenings I finally came around to loving this rather unusual hour of Voyage.
My point: if you don't like this episode at first, come back every year for another screening until you do like it: you will warm to it eventually.
Added note: some of the music heard in this hour is different and better than a lot of the previous Voyage music. The music in question would be re-used in several Time Tunnel episodes.
Finally, I have to take three points away from this episode for very personal reasons. I have always been very uncomfortable looking at hospital operations involving contact with the eyes (we get that in this hour).