As with most things in life, the answer is "it depends".i need closed captioning as my hearing is not as sharp as it was.
if i use something like Tivo Desktop or one of the other tools out there that back up tivo shows, can i restore the shows and still have the closed captions or will i lose that ?
also, what tool do you like best for saving tivo shows ?
i know of tivo desktop (of which i paid for the plus version back when they still sold it)
i know of pyTIVO and KMTTG (not used them yet though)
i have heard of DVRbars but not used it yet.
If you use TiVo Desktop to copy the programs, closed captions are retained in the file and will be there when you bring them back. (The downloaded version of TD has an expired certificate. This needs to be updated for it to work at all. Someone already pointed out that TE3 is also required to send them back to your TiVo.)
If you use KMTTG, captions might be removed, depending upon how you process the downloaded file, but the *.tivo files at least retain the closed captions. If you process the files with Handbrake (for example) to reduce the size, there are options that can be used to either retain the closed captions in the file or extract them to a side file, but by default they are removed.