Fall TV with Ted Cox

What's new tonight:

• "Chuck," 7 p.m., WMAQ Channel 5. TV's season of nerds gets under way on NBC with a Geek Squad-style computer technician having U.S. government secrets downloaded into his brain.

• "The Big Bang Theory," 7:30 p.m., WBBM Channel 2. Johnny Galecki and Jim Parsons are two more nerds flummoxed when a hottie moves in across the hall in a new CBS sitcom.

• "Journeyman," 9 p.m., Channel 5. A San Francisco newspaper reporter has trouble holding his home life together when he keeps getting sent into the past to do good deeds.