Churchill adapted her script for the forthcoming HBO Films-BBC Films collaboration. Frank Doelger, Tracey Scoffield and Lee Morris will produce. No air date has yet been set, but it is expected for some time in 2008.

A son discovers that he is one of a number of clones produced by his father in the work by the author of Top Girls and Cloud Nine.

The play made its world premiere at London's Royal Court Theatre with Stephen Daldry directing Michael Gambon and Daniel Craig. The work then came stateside to Off-Broadway's New York Theatre Workshop starring Sam Shepard and Dallas Roberts with Macdonald directing.

Churchill's plays also include Drunk Enough to Say I Love You?, Far Away, Serious Money, Blue Heart and This is a Chair.

Wilkinson can be seen in the current film "Michael Clayton." The actor has also appeared in "The Full Monty," "Shakespeare in Love," "In the Bedroom," "Eternal Sunshine of the Spotless Mind," "Batman Begins" and "Stage Beauty," among others. For HBO he has starred in "The Gathering Storm," "Normal" and the forthcoming "John Adams" mini-series as Benjamin Franklin. Ifans — currently on the big screen in "Elizabeth: The Golden Age" — is known for his film work in "Notting Hill," "Little Nicky," "Human Nature," "Danny Deckchair" and "Vanity Fair," among others.