Here's why that's the case:
* Wikipedia's Organization: Wikipedia pages are organized alphabetically, unless there's a strong reason to deviate from that. This is to make it easy for users to find the information they're looking for.
* "Big Bang" Ambiguity: The term "Big Bang" is used in both contexts - the scientific theory and the TV show. Therefore, it makes sense to list them in alphabetical order, as there's no clear "primary" meaning of the term.
It's important to note that Wikipedia does have separate pages for both the Big Bang theory and The Big Bang Theory TV show. This allows for a complete and accurate description of both concepts.