4. Fool Me Once...

When an Arctic explorer is killed during a polar expedition, the mysterious circumstances of his death take Castle and Beckett from the penthouses of Park Avenue to the halls of the CIA. But Castle's delight at the case's many twists and turns soon turns to frustration as he realizes that their elusive killer might just be fooling them all.

Plot summary and ending

Spoilers ahead. Coverage follows the scope labeled below.

Complete story — includes the ending

Castle and Beckett investigate the murder of a con man who was killed while posing as an Arctic explorer for school children. The case takes several interesting turns, fascinating Castle and infuriating Beckett. They are tipped that the victim was actually a CIA operative and may have faked his own death, but when an old CIA contact of Castle's disputes that the victim was ever a spy, everyone wonders just who is being fooled. Meanwhile, Castle faces Alexis's wrath when she finds out he ran a background check on her violin teacher.

Sources and content license

Source and revision history · Adapted from Wikipedia contributors, Castle season 2. HTML formatting and reference markers removed. · Content license