Snips from ABC News:

Former New Mexico governor Gary Johnson and three other non-major-party presidential candidates will debate on Tuesday, a day after Obama and Romney square off, with former CNN host Larry King moderating their debate of alternatives at the Hilton Chicago.

The debate will feature the Libertarian Party nominee Johnson, Green Party candidate Jill Stein, Constitution Party candidate Virgil Goode, and Justice Party candidate Rocky Anderson.

And here is where to find it:

No major networks will carry it–at least no major American networks. It will stream online at three outlets: ORA.tv, where King now hosts a show; Russian English-language network Russia Today; and the Free and Equal Elections Foundation website.

All four of these candidates are on the Tennessee ballot, though only Goode and Stein bear their parties’ labels. Mark your calendars.