You could get a SDR dongle. The cheap ones probably won’t fo AM well, but they make excellent FM tuners, as well as aircraft, 2-metre and 70cm ham bands with a pretty basic antenna.

ATSC 3.0 is usable. I have a HDHomerun sitting on my LAN with a couple 3.0 tuners.

The big problem is:

• the 3.0 broadcasts are still mostly tests, so you get mostly a respin of a 1.0 channel

• the audio is AC-4 and a lot of software doesn’t support it. There was stuff for Windows but when I looked, the usual suspects (VLC, mpv) on Linux didn’t support it

Why not an aerial for Jeopardy? It’s usually on local broadcast, so you could plumb together a DVR setup if you want it within a unified experience.

Doom. I’d make an adorable Cacodaemon and by the nature of Doom, I will be everywhere, blasted across the universe as programmers port me to anything that can oscillate between a high and low signal level.