This list contains all the characters in The Big Bang Theory.
While a lot of sub-categories have been grouped under this category, the main sub-categories include:
- Main Characters : Characters whose names appear in the opening credits, even if only occasionally
- Recurring Characters : Characters who appear or used to appear in the show from time to time. They tend to have a more important role in the series.
- Minor Characters : Characters who have appeared only once or a few times. They may or may not have a prominent role in the episode(s) they appeared in, and are not significant to the whole series.
- Unseen Characters : Characters who are only heard or seen partially without showing their faces. They are still played by actors or voice actors.
- Mentioned-only Characters : Characters who are only mentioned in the show. They are not played by any actors.
- Appeared As Themselves : People who have appeared in the show as (perhaps a dramatized version of) themselves, including those who have appeared as someone's imagination, fantasy or in a dream.
- Male Characters : Male characters whether they have major or minor roles.
- Female Characters : Female characters whether they have major or minor roles.
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