Norman Burton (Yalu) previously played the Hunt Leader, the first ape seen by the audience, in Planet of the Apes (1968) and a prominent Army Officer in Escape from the Planet of the Apes (1971).
Galen's mother Ann is the only female ape in the "Apes" universe to not have a name ending with an "a".
This episode was one of a selection put together as two-in-one features aired with 'Old Galen' introducing and closing the feature (which opened with "The Surgeon"). So if this episode is aired alone without opening credits, you're actually watching the second half of Life, Liberty and Pursuit on the Planet of the Apes (1980) (with the final 'Old Galen' wrap scene removed, it's then identical to "The Interrogation", except that the entire opening chase scene is omitted on the compilation "movie" - Life, Liberty and Pursuit on the Planet of the Apes (1980), where the closing credits will differ, showing the double-bill's production code (starting Z-) instead of the usual B- for episodes).
Production code number is B-512. Although this was the tenth episode broadcast, it was twelfth in production order.
This episode takes place in 1980 and 3085.