1/2 Nikki is wooed by a science minister as she and Jack investigate a murder.
2/2 Alan Lane vehemently protests his innocence and insists he didn't kill his wife.
1/2 A pub landlady is stabbed to death and her little finger cut off.
BBC One except Northern Ireland
2/2 Nikki, Jack and DI Reed realise one of the victims was killed by a controlled sedative.
1/2 The murders of two women in a house basement force Jack to lock horns with an old flame.
2/2 Nikki, Leo and Jack realise the extent to which wealth and power can corrupt.
1/2 Nikki, Leo and new recruit Jack are plunged into a murky world of corporate subterfuge.