Conversation:

Great entry

Spotted one errant 'to' in section of facts at the end:

"Douglas had a few TV appearances in his lifetime, including that of a masked surgeon in a Monty Python sketch, a naked man returning TO to the seas in the Hitchhiker's TV series, and for those with eagle eyes his posthumous image can also be seen in the 2005 film."

The word 'posthumous' falsely suggests to me that the picture was taken after his death, rather than that the image was incorporated into the film after his death. Possibly worth removing 'posthumous'

Pictures of the memorial stone could be incorporated into the text. They are some here:
http://www.douglasadams.se/jenz/dnasite.jpg
http://www.douglasadams.se/jenz/dnasite2.jpg
http://www.douglasadams.se/jenz/dnasite3.jpg