Remorse - [s1e20]

: Include the season and episode number (e.g., season 1, episode 20) to help readers locate the source. Examples by Style Guide

Regarding the "proper paper" portion of your query, this likely refers to the for citing a television episode in an academic paper. Academic Citation Standards [S1E20] Remorse

: The name of the entire television series— Law & Order: Special Victims Unit —should be italicized . : Include the season and episode number (e