[s2e17] Tick, Tick, Tick... Guide

The "solid story" element that fans often discuss is the logistics of the killer’s escape. The team tracks the killer to an apartment, where they hear a gunshot. They burst in to find a man dead of an apparent suicide. However:

: Agent Shaw uses high-tech surveillance and psychological profiling, which contrasts with Castle's creative intuition and Beckett’s traditional police work. [S2E17] Tick, Tick, Tick...

Explain the logistics of how the killer faked the suicide. Recommend other high-stakes two-parters from the series. The "solid story" element that fans often discuss