by Stephen Cronin on WordPress.org
Add the parent comment to comments in the WP Admin area, in order to assist with comment moderation

Show Parent Comment in action on the Comments screen.
When moderating comments in the WordPress Admin area, it is useful to be able to see the parent comment if one exists.
You don’t need to do anything. Simply activate it and the parent comment will appear for comments that have one.
The free version of this plugin is officially not supported, but if you leave a comment on the plugin’s support forum, I’ll try to help if I can.
This plugin is released under the GPL licence. I do not accept any responsibility for any damages or losses, direct or indirect, that may arise from using the plugin or these instructions. This software is provided as is, with absolutely no warranty. Please refer to the full version of the GPL license for more information.