Series 6 aired between 14 Jan 1990 and 01 Apr 1990, 12 episodes.
Episodes
E01
Old Flames
14 Jan 1990
E02
The Man From The Pru
21 Jan 1990
E03
Drowning in the Shallow End
28 Jan 1990
E04
Close Relations
04 Feb 1990
E05
The Impossible Spy
11 Feb 1990
E06
He's Asking for Me
18 Feb 1990
E07
Sometime in August
25 Feb 1990
E08
Small Zones
04 Mar 1990
E09
Circles of Deceit
11 Mar 1990
E10
The Lorelei
18 Mar 1990
E11
Children Crossing
25 Mar 1990
E12
The Kremlin, Farewell
01 Apr 1990