I got a question for you: Although none of the episodes from series 3 made it into the top ten programmes of the week on their initial screening, a repeat showing of the final episode, "Isometrics and After," attracted 15 million viewers during a repeat screening in spring 1977. Also notable was the inclusion for the first time of a two-part episode consisting of "The Great Boarding House Bathroom Caper" and "Cheering Up Gordon," both featuring guest appearances by Philip Jackson as Compo's nephew, Gordon.

Based on this passage, who played gordon in last of the summer wine?
Let's think first:
The relevant sentence in the passage is: Also notable was the inclusion for the first time of a two-part episode consisting of "The Great Boarding House Bathroom Caper" and "Cheering Up Gordon," both featuring guest appearances by Philip Jackson as Compo's nephew, Gordon.
Therefore, the answer is Philip Jackson.