David - find myself agreeing with your opening statement, however, I thought the look on Jarvis' face when 'the light came on' and he realised he was rumbled was great, but totally agree that the Negative Reaction ending was superb!

I liked this episode but have trouble with the car down the cliff

1. How could they do that to an E Type!!
2. How complete was the car? it looked a bit hollow to me, just a rolling shell maybe?

Columbos cliff descent was priceless and certainly the quickest route.