AN INSTINCT FOR MURDER

This episode was originally planned to be shown in two 1 hour parts. When it was decided to cut this to a single hour, Chris Boucher had to rewrite this episode repeatedly, slowly adjusting the original concept to the one that was filmed.

In earlier versions of the script Nathan investigates the drowning man case. Lars Hendvorrsen is killed and Nathan becomes Commander ISPF. David Theroux comes to Earth and meets Nathan who is starting his initial space training with space suit familiarization in his flat. It all then follows a very similar route to the well known version.

There are lots of little changes but originally David Theroux was a Canadian and Pal Kenzy's cameo role was fulfilled by a middle aged indian on a space station which isn't one of the five major ones.

The swimming shots were conducted on Wednesday 21/08/86 at Korda Lake, Broadwater Park, Denham, Bucks.