They definitely said Acton. I think he was the driver of the train. I noticed in the depot shots that they were walking along the middle of the shed road actually between the yellow safety lines. Not good practice I wouldn't have thought. I noticed that they closed the J door from the passenger side. I hope they didn't have a J door key. :-)
I watched that episode. I thought they were going to say that the man was killed as a train made its way from Edgware Road to the Hammersmith depot. But he wasn't. Great episode anyway!
The next train to arrive at Platform 9 is a Metropolitan Line service for Luton Airport (via Harrow-on-the-Hill and Chesham). This train will consist of 12 cars. Please stand well back from the edge of Platform 9.