BBC One's new drama McMafia opened up to more than 5 million viewers last night.
The first of eight episodes averaged 5.6 million viewers on New Year's Day, although numbers declined throughout the show. The second instalment airs tonight at 9PM.
Earlier on BBC One, EastEnders was the channel's most watched show on the first day of 2018. 6.6 million tuned in for the latest episode.
David Walliams' Grandpa's Great Escape had 4.9 million viewers for its TV adaption and Mrs Brown's Boys New Year's special performed strongly with 5.5 million.
The premiere of the latest Bond film Spectre had 5 million viewers from 8PM.
Elsewhere, on Channel 4, the second of two festive Great British Bake Off specials had 2.6 million viewers at 7:40PM.