Now it's exactly 1 month later from when this topic was started, so I'm up to September 1977 and this morning I heard "The Waiting Room".

This was one of the dumber plots, but I've heard worse from this series.
The demonic birds were obviously not real birds but demons in bird form.
Marian Seldes and Russell Horton using the young couple and Burt Thomas to complete their satanic ritual to bring back Adolph Hitler in itself was recycling an idea better executed in an earlier Mystery Theater episode in which Hitler is revived by a group of German scientists plotting to start a Fourth Reich in modern times. He spoke English too, so we really can't fault the writers for typically going that route.
I almost commented on this in my "Executive Decision" topic, until I remembered this thread.