To "prepare a feature" for downloading episodes from the series (including the John Wayne Gacy, Jeffrey Dahmer, and Ted Bundy tapes), you should use the official Netflix app, as this series is a Netflix original and not available for direct file download as a standalone file (like an MP4) from other legal sources. How to Download for Offline Viewing

: Use the search bar to find the specific installment you want: Conversations with a Killer: The John Wayne Gacy Tapes Conversations with a Killer: The Jeffrey Dahmer Tapes Conversations with a Killer: The Ted Bundy Tapes

: On the series description page, look for the Download icon (a downward-pointing arrow) next to each episode or the "Download Season" button.