Scott Bakula recently guest-starred on NBC's Chuck, on three of the last four episodes of the show's 2nd season. He played Stephen J. Bartowski, father of main character, Chuck Bartowski.
These episodes were aired in the U.S.A. on April, 2009, and are scheduled to be aired soon in Latin America and Europe.
On Chuck, also co-stars Bonita Friedericy, John Billingsley's wife, who also guest starred on Star Trek: Enterprise's episode "Regeneration" (season 2, episode 23).
Here's a short (54 seconds) excerpt from one of those Chuck's episodes:
