I can't get one of my calendars to show up on my laptop (it shows up on my phone).

Does anyone know what to do if one of my calendars disappears from the list of calendars I have on iCal? Oddly, I can see it on my phone. I tried switching from iCloud to On This Mac but nothing changed. All my other calendars are showing up in both places. I quit and restarted the computer. Nada.

Thanks.