Both shows were roughly even when they began on January 25, with Lost registering 974k (4.6%) and Being Human picking up 898k (3.9%).
Last night Lost - now in its penultimate season - averaged 936k (4%) in the 9pm hour. Being Human, meanwhile, has lost viewers every week to date and last night dropped to just 578k (2.5%). The figure is still up around a third on the channel average for the slot, however.
Also at 9pm last night, ITV2's Supernatural brought in 472k (2%) and 169k (1%) more on ITV2+1.
ITV1's Dancing On Ice pulled in the best numbers of any channel yesterday, with 9.13m (35.5%) tuning in for the latest performances show between 6.45pm and 8.15pm. Wild At Heart followed with 7.57m (27.9%) for an hour, then Melinda Messenger's exit from Dancing On Ice was seen by 8.01m (31.2%).
Piers Morgan's new chat show Piers Morgan's Life Stories began with a respectable 4.48m (24.2%) in the 10pm hour for ITV1.
Antiques Roadshow started the night strongly for BBC One, with 6.25m (24.1%) tuning in in the 7pm hour, then the latest episode of Lark Rise To Candleford had 5.84m (21.3%).
Jeremy Paxman's The Victorians put in 4.48m (17.2%) at 9pm, a rise of 150k on last week's opener.
ITV1 averaged 30.7% in primetime overall, comfortably ahead of BBC One's 19.3% share.
Channel 4's latest Celebrity Come Dine With Me - this week featuring Michelle Gayle and The Apprentice's Raef as guests - had an impressive 2.6m (9.5%) in the 8pm hour, with a further 269k (1.1%) on Channel 4+1. A screening of comedy My Super Ex-Girlfriend then kept 2.17m (9.3%) until 10.50pm.
On BBC Two, Richard Hammond's Engineering Connections appealed to 2.63m (9.6%) from 8.10pm and travel documentary Solitary Endeavour On The Southern Ocean managed 1.42m (5.4%) in the 9pm hour.
843k (3.1%) tuned in for Five's Ice Road Truckers in the 8pm hour, after which Steven Seagal film Attack Force averaged out to 1.17m (5%).
Channel 4 had an average primetime share of 7.5% (+1: 0.8%), followed by BBC Two with 8.1% and Five with 4.1%.
Ratings data supplied by Attentional