* He, she, it, they: These are the basic third-person singular and plural pronouns.
* Him, her, it, them: These are the objective case pronouns.
* His, her, its, their: These are the possessive pronouns.
The key thing to remember is that the narrator in third-person omniscient can jump between different characters' perspectives at any time and reveal their thoughts, feelings, and motivations.
Let me know if you have any more questions about point of view!