People seem to capitalize it by their own preference, and often "is" or "are" end up not-capitalized in episode titles. There's a rule (or at least a convention) for which words get capitalized in titles. It's called title case, and it’s commonly used in titles of books, movies, TV shows, etc..
Not sure if this is included in data policy guidelines, but in case it isn't it might be a good way to put it someplace there. You can easily browse and look for this convention, but here's a quick summary I got when I asked gptChat, so perhaps adding this someplace would be informative so we don't end up with different looking titles based on whose is adding titles.
Here's the basic rule of thumb for Title Case:
1) Capitalize:
- The first and last word of the title (always)
- Nouns (e.g., Apes, Planet)
- Pronouns (e.g., She, It, They)
- Verbs (e.g., Go, Is, Run)
- Adjectives (e.g., Blue, Great)
- Adverbs (e.g., Quickly, Very)
- Subordinating conjunctions (e.g., Although, Because)
2) Don't capitalize (unless they're first or last in the title):
- Articles: a, an, the
- Coordinating conjunctions: and, but, or, nor, for, so, yet
- Short prepositions (typically under 4–5 letters): at, by, for, in, of, on, to, up, with
According to CMOS (Chicago Manual of Style), all prepositions, regardless of length, should not be capitalized. Other (Non-US like AP, MLA are the same, though Oxford/UK is a bit more flexible in that regard).
- All prepositions: into, under, beneath, with, without
So, here is how some such proper capitalization would look like:
- "Planet of the Apes"
- "There Is No Tomorrow"
- "A Rock and a Hard Place"
- "With or without You"
