Megan Gallagher is something of an adaptation whisperer. The writer and executive producer whose credits include the BBC miniseriesWolf, based on the Jack Caffery novels by Mo Hayder, and the upcoming ITV drama The Blame, adapted from Charlotte Langley’s novel, delivered Peacock’s most watched original series to date — 46 million hours viewed in its first three weeks — withAll Her Fault. The adaptation of Andrea Mara’s best-selling novel stars Sarah Snook as Marissa, a mother in distress when her son, Milo (Duke McCloud), goes missing and secrets about everyone in her inner circle — particularly her husband, Peter (Jake Lacy) — begin to…
