From the Seattle Post-Intelligencer:
  Members of The Firesign Theatre comedy group are guests
  on "The Beat" at 2 p.m. Thursday on KUOW-FM (94.9)

That's 5 PM on the East coast.

You can listen live on the web at
http://www.kuow.org/listen_live.html

It's an hour long show; on Thursday, The Beat's web page
should show when they'll be on.  In case you miss it,
they archive shows for a week:
http://www.kuow.org/thebeat.asp

The Beat is also repeated at 10 PM Pacific time on KUOW2
http://www.kuow.org/kuow2.html

Red-lighted sky slated to appear in east.
Sonic booms scare minority groups in Sector B.
And there's hamburger all over the highway in Mystic, Connecticut.
  -- Firesign Theatre