The Department of Homeland Security (DHS) is a central focus in the podcast episodes provided, as they discuss various events and controversies related to the department's operations and oversight.

The first episode, P. Diddy, explores the recent raids conducted by the Department of Homeland Security on Sean 'P. Diddy' Combs' homes, and the various theories surrounding the motivations behind these raids.

The second episode, The Perfect Storm (S1 E6), investigates the failures of the Department of Homeland Security's inspector general, Joseph Cuffari, in properly investigating major events like the January 6th insurrection, and the lack of accountability mechanisms for inspectors general.

These examples demonstrate the significant role the Department of Homeland Security plays in the topics covered by these podcast episodes.