| Episode cast overview, first billed only: | |||
| Zachary Levi | ... | Chuck Bartowski | |
| Yvonne Strahovski | ... | Sarah Walker | |
| Joshua Gomez | ... | Morgan Grimes | |
| Sarah Lancaster | ... | Ellie Bartowski | |
| Adam Baldwin | ... | John Casey | |
| Jonathan Sadowski | ... | Laszlo Mahnovski | |
| Rick Hoffman | ... | Agent Scary | |
| C.S. Lee | ... | Harry Tang | |
| Bonita Friedericy | ... | General Diane Beckman | |
| David Burke | ... | HR Manager | |
| Ryan McPartlin | ... | Devon 'Captain Awesome' Woodcomb | |
| Mark Christopher Lawrence | ... | Big Mike | |
| Vik Sahay | ... | Lester Patel | |
| Scott Krinsky | ... | Jeff Barnes | |
| Julia Ling | ... | Anna Wu | |
Halloween preparations take a backseat when Chuck sympathizes with Laszlo Mahnovski, a genius inventor kept in isolation to work for the CIA, who escaped and is suspected of vicious murders. Buy More's nerd herd meanwhile is to apply for the vacant lower management post, for which only absent Chuck is truly fit. Written by KGF Vissers