In this episode, the stakes of the ongoing war reach a breaking point as Alfred and his allies attempt a desperate mission.
The Sykes sisters (Bet and Peggy) set their own plans in motion to honor the wishes of the late Lord Harwood.
Knowing it is likely a suicide mission, Alfred seeks out Sandra to apologize and express his love.
The episode features Martha drinking alcohol, which she suggests is a "test" from Aziz to see if she is pregnant. In reality, the negative effects of alcohol on pregnancy were not widely established until the 1970s. Other Shows with "Paradise Lost" (S2E9)
Several other series have episodes with this title or similar themes in their ninth episode of Season 2: "Pennyworth" Paradise Lost (TV Episode 2021) - IMDb
Thomas Wayne proposes marriage to Martha during this tense period.