Blue Blood is a 1973 British horror drama film directed and written by Andrew Sinclair and starring Oliver Reed, Fiona Lewis, Derek Jacobi and Anna Gaël.

Gregory, the young lord of the Swanbrook estate, engages German nanny Beate to care for his children while he pursues a life of debauchery with his mistress Carlotta and their affluent friends.

Gregory entrusts all running of the Swanbrook manor house to his menacing butler, Tom, who scorns his weak-willed master's decadent ways and plots to take control.

[1] Describing the film as "a variation on Harold Pinter's The Servant, Graeme Clark of website The Spinning Image writes that Blue Blood over-emphasises a simple premise and frustratingly leaves plot threads unresolved.

As the vicious butler intent on destabilising his weak-kneed aristocratic employer (Derek Jacobi), Oliver Reed gesticulates and rolls his eyes.