As picket lines for the Hollywood writers strike went up Monday, networks and producers dusted off early contingency plans, which are expected to impact all major late night shows:

NBC announced its "The Tonight Show" will immediately go into reruns.

CBS said "The Late Show With David Letterman" will also offer repeats all week.

Previously, Comedy Central announced that "The Daily Show With Jon Stewart" and "The Colbert Report" would likely go into repeats.