Still free on Yahoo View (from Hulu)
[This post has been edited and updated.]
As you may know, the entire Twilight Zone original series was
formerly "free" on Hulu in the U.S., but (some time ago) that show's
availability on Hulu was changed to require a subscription.
Meanwhile, long after that change was made,
Night Gallery still remained free on Hulu.
... But nothing lasts forever ....
Update:
Recently, Hulu's remaining "free" content has been
moved to Yahoo View . (http://view.yahoo.com/).
At the time I last edited this post (August 31 2016),
Night Gallery is still available free, now on Yahoo View at:
. ➡ http://view.yahoo.com/show/night-gallery/episodes
So, if you want to rewatch Night Gallery free (and of course legally) without a subscription,
you've still got the chance ... but there's no telling how long NG will remain free on Yahoo View.
(Let's hope it may remain available there for a good long while.)