by turns

It features a probing interview with Stewart, who is by turns cagey and bluntly honest.

Things will get better, and worse, and better, sometimes by turns and sometimes all at once.

Some reviews have awarded the film five stars, including the Telegraph's Tim Robey, who wrote: "The Substance is a humdinger of a satirical horror-thriller, by turns hilarious, affecting and jaw-droppingly grotesque."

The broad-strokes treatment, by turns suspenseful and rollicking, works well in an outdoor summer Shakespeare presentation that makes the Wars of the Roses seem Spielberg-ian in intrigue and suspense.

It all leaves Sam in a situation where she’s not only a lone target for the pair’s “These kids today”-style ribbing, but also, by turns, a personal assistant, cook, advisor and peacekeeper.