Deadly Dream (1971)
From TCM, here's a synopsis:
A research scientist is driven to the brink by a recurring dream that
he is marked for death by a mysterious tribunal, and soon he is unable
to separate his dreams from reality -- and vice versa.
From Great Old Movies, the plot in detail:
Dr. Jim Hanley is working on certain revolutionary DNA experiments
that have the powers-that-be at his university nervous. He begins to
have recurring dreams in which he is chased by menacing members of a
group calling themselves the Tribunal.
The spooky thing is that when he wakes up he has the minor injuries
that he received running from the group in his nightmares.
Then he starts seeing some of these men in his waking hours, also
bearing scars from the dreams.
A colleague tries to help him in one of his nightmares, but he is
later killed in real life.
Before long, Hanley is totally paranoid, suspecting anyone and
everyone of plotting against him, including his own wife. He begins to
wonder if his "real" life is just a dream, and the world of his
nightmare is his true reality.
It was first broadcast as part of ABC's Movie of the Week series. Here are the closing scenes where the members of the Tribunal gather around Hanley:
Most of it appears to fit your description. Watch the movie here to confirm.