The Staircase Vincent Vermignon joins the cast of HBO Max’s true-crime series ‘The Staircase’ 3 years ago Vincent Vermignon has joined the cast of The Staircase, HBO Max's restricted series drama adaptation dependent on Jean-Xavier de Lestrade's… Tim Guinee is set to star in HBO Max’s true-crime series ‘The Staircase’ 3 years ago Tim Guinee is set to star in The Staircase, HBO Max's limited series drama adaptation dependent on the true-crime docuseries.… Olivia DeJonge joins the cast of HBO Max’s true-crime series ‘The Staircase’ 3 years ago Olivia DeJonge (The Society) has joined the cast of The Staircase, HBO Max's limited series drama adaptation dependent on the… Sophie Turner joins the cast of HBO Max series ‘The Staircase’ 3 years ago Sophie Turner has joined the cast of the HBO Max series “The Staircase." Turner joins recently declared cast members Colin…