The dying Earl of Warbeck summons his nearest and dearest for a final Christmas at Warbeck Hall. A snowstorm hits, leaving the guests trapped and cut off from the world. No one’s unhappier about this than the Earl’s son and heir, Robert, the leader of a dangerous new political party. As the evening progresses, an attempt is made on Robert’s life and he is determined to find the culprit. Is it the jilted lover, the resentful cousin, the belittled butler, a mysterious guest? Everyone has motive and opportunity in this darkly satirical whodunit… But who will make it through the night?
Unfortunately the movie Sleeping Lions is not yet available on HBO Max.
| Directing | Mat Whitecross | Director |
| Production | Fiona Neilson | Producer |
| Production | Rupert Lloyd | Producer |
| Production | Cyrus Massoudi | Producer |
| Writing | James Roblin | Writer |
| Writing | Cyril Hare | Novel |
