TV

Yep, your computer can be a TV with no internet connection.  You do need a USB TV Tuner though.  I use the Hauppauge HVR935 which is probably obsolete since I couldn’t find it anymore on Amazon. This seems to be the latest generation.  Despite which tuner you get make sure that it is ATSC and not PAL.  ATSC is US and PAL is European.   Your tuner combined with software called NextPVR or probably any number of software programs you can download will give you an Electronic Program Guide and allow you to watch Over The Air Live TV.  That program guide does come down from the internet though, and you won’t be able to access it if the grid goes down.  Still, you know what your local channels are though. 

RADIO

While you may have a radio in your bug out bag it probably is an AM/FM radio.  And that might be great, but what you really want is a SoftWare Defined Radio (RTL-SDR).  This is a USB device and with free software such as SDR# you can listen to AM/FM/Shortwave/Fire/EMS/Police/Weather/CB/GMRS, etc.  And in fact with the right antenna you can also pull down images from weather satellites such as NOAA or GOES on an RTL-SDR.

I can’t even begin to emphasize how much information an RTL-SDR can provide and what they are capable of doing.  Once again, in a bad situation, radio can provide life saving information.