The podcast episodes examined in the provided documents delve into the topic of UFOs and aliens from various angles, exploring conspiracy theories, alleged government secrets, and the cultural phenomena surrounding these subjects.

Several episodes, such as #420 - Annie Jacobsen: Nuclear War, CIA, KGB, Aliens, Area 51, Roswell & Secrecy and #300 - Joe Rogan: Comedy, Controversy, Aliens, UFOs, Putin, CIA, and Freedom, directly address the topic of UFOs and aliens, discussing theories and speculation surrounding the Roswell incident, Area 51, and the potential for extraterrestrial visitation.

Other episodes, such as Side Stories: A Tale of Hit & Run and Cattle Mutilation with Rachel Monroe, touch on the topic more tangentially, examining the connection between cattle mutilation and UFO/alien conspiracies.