Chuck Versus the Anniversary - S4-E1
Factual error: Chuck is supposedly riding a Los Angeles city bus. But the buses pictured are NYC buses. (00:14:05)
Chuck Versus the Fear of Death - S4-E8
Continuity mistake: Near the end when Jeff and Lester confront "Greta" in the cage she pulls out her knife. Jeff attempts to disarm her but she cuts off his tie. She cuts it very close to the top, leaving very little around his neck, but when it cuts back to him after showing the piece hit the floor there is much more tie left.
Chuck Versus the Suitcase - S4-E2
Factual error: During a fast serie of Milan and runways shots there is one pic of the harbour of Hamburg, Germany. (00:08:05)