Restoring deleted show files

There is not - the board doesn't use any sort of Recycle Bin when shows are deleted. Once they are deleted, they are gone and not recoverable.

It sounds like there's a not-so-fun story behind the question -- I've been there before. Sorry there's not much there to get the files back!

It might be possible to remove the hard drive and use a data recovery program or service to recover the deleted files. Typically deleting a file removes the entry from the directory and makes the inodes available for reuse. The data is still there until something overwrites it.

Get ETC support involved in the remove/replace operation if you decide to try this.