Two Kinds Of Time Patrol Series III

At the beginning of "Time Patrol," Mary Nelson and the neighbours whom she was visiting have been killed by a V-bomb on 17 November 1944. Mary is survived by her fiancee, Charlie Whitcomb, who lives and dies as a bachelor. 

However, by the end of this story:

Mary is missing, presumed killed by the V-bomb that destroyed the house of her neighbours, the Enderbys;

the Enderbys survived because a man had told them to go to Mary's house;

Whitcomb was presumed drowned in 1947.

(Everard's intervention to save the Enderbys would be remembered as an "angel" story.)

Whitcomb leaves the Patrol. He and Mary live in Victorian England. There are some loose ends here but this is the first Time Patrol story.

To help the Whitcombs, Everard did not need to save the Enderbys. The Patrol lets him get away with this because they want him as an Unattached agent.