ITV's comedy line up down 1m viewers after one week

The ratings for both Newzoids and The Delivery Man fell by over a million viewers this week.

The ghost of Joe Orton looms large over this spirited black comedy from White Noise scriptwriter Niall Johnson. A dark British farce, it boasts a delicious performance by ]Maggie Smith as an elderly housekeeper with a deadly way of resolving domestic unrest. Hired to look after the family of Rowan Atkinson's nerdy country vicar, she quietly sets about tackling their individual problems - from his son being bullied at school to his teen daughter's nymphomania.

While her resulting Serial Mom-style solutions are often predictable, they're no less entertaining, benefiting from some neat gallows humour and an edgy sense of fun. In fact, Smith outshines all the cast with her immaculate comic timing, despite strong competition from Patrick Swayze as a sleazy US golf instructor who's romancing Atkinson's wife, Kristin Scott Thomas.

Surprisingly, the only real downside is Atkinson, whose customary bumbling schtick feels forced and twee in an otherwise boisterous affair.

Adapted seamlessly from its original American setting by writer/director Niall Johnson (novelist Richard Russo penned the initial script), Keeping Mum manages to be both reassuringly familiar and surprisingly fresh. Apart from the witty script, the secret to its success lies in its offbeat casting. Scott Thomas loosens her stiff upper lip and clearly relishes playing Gloria Goodfellow, a wife and mother who's thinking about playing around with a sleazy golf instructor (Swayze) and abandoning her inert husband Walter (Atkinson), the vicar of Little Wallop (don't worry, nothing else is quite so twee).