COMET is a network that airs sci-fi and horror programming. It tends to be a sub-channel, which is something that was introduced once TV broadcasting switched to high definition. For example, in my part of the country COMET broadcasts over the air on Channels 10.3 and 38.3. Most cable companies also pick up these sub-channels and include them, though more often it's necessary to scroll through your cable channels to find them. For example, the main version of Channel 10 in my area (10.1) is also 10 on my cable system, but 10.3 is 291 on my cable system. And when it comes to 38.3, it's 939 on my cable system.