Unfortunately, I never know this is going to be on in time to notify anyone. And, when it starts, I usually forget that he's in it. This must have been the 3rd or 4th time I saw it.
It's one of the Sixth Sense episodes that are shown as Night Gallery. The specific title is "Through a Flame Darkly" and it stars Sandra Dee. It's really good. Karlen has a small but significant part. If they continue repeating these, maybe I'll find out about it ahead of time the next time around.
