★★★★ "Highly entertaining" Financial Times
★★★★ "A fast-talking, big-thinking look at the future" The Standard
★★★★ "Challenging, thought-provoking and sometimes gasp-inducingly close to the bone" The Stage
★★★★★ London Living Large
★★★★★ The Recs 
★★★★ The Arts Desk 
★★★★ All That Dazzles
★★★★ The Reviews Hub
★★★★ ReviewsGate
★★★★ London Theatre 1
★★★★ Everything Theatre 

Fresh from her feature in Forbes 40 Under 40, venture capitalist May Lee is on the hunt for her first unicorn - the rarest of beasts, in the form of a start-up with a $1bn valuation. It would skyrocket both her career and net worth, guarantee promotion to partner and cement her legacy as one of the best in the business. Enter Willa McGovern, a hungry young entrepreneur with an idea that could be life-changing not only for May, but the entire human race…

With her mentor Paul keen for results and the potential of saving countless lives, May quickly discovers that ambition, ego and cold hard cash can twist even the purest of intentions. As technology hurtles toward making science fiction into reality, the question becomes not whether we can change the world, but what it will cost us when we do.

Provocative, darkly funny and disturbingly plausible, Aaron Loeb’s R.O.I. (Return On Investment) questions ethics, ownership and the cost of innovation. Aaron makes his UK debut with R.O.I., following acclaimed Off-Broadway productions Ideation and Abraham Lincoln’s Big, Gay Dance Party. Chelsea Walker returns to Hampstead following Visit From An Unknown Woman, This Much I Know and Yous Two.

An Audio Introduction is available for this production. This is a pre-recorded introduction describing the set, characters and costumes and includes an interview with the cast. Click here to listen to the Return On Investment audio introduction.

Suggested age guidance 14+

Thematic: Strong language, racism and antisemitism, depiction and discussions of dementia, cancer and death and sexual references.

Technical: Flashing lights.

Please note that our content warnings evolve as the production does throughout rehearsal and previews, so there may be changes made between booking and attending the theatre. If you would like to speak to a member of our team about specific themes or concerns, please call the Box Office on 020 7722 9301 or email boxoffice@hampsteadtheatre.com