Tom Paris tells B'Elanna Torres
that there were no remote controls in the 1950s. The remote she
gives him was developed by Zenith in 1956, but remotes were not
widespread until the MOS transistor was used in TV's, which was
after 1960.
The plot of this episode is similar
to that of Season 3's "Remember" - Voyager personnel (in that
case, just one - in this case, many) experience a terrible past
event as if it were their own memories, after eyewitness
accounts of the atrocity are telepathically implanted into their
brains in the hopes that anyone who went through such a
traumatic experience would do whatever they could to prevent it
from ever happening again.
Several props and costumes from
this episode were sold off on the It's A Wrap! sale and auction
on eBay, including costume components of Gary Franks.