Has the episode been added to the collection yet? I have checked from here and can see that all of the episodes are available on V6 but not on the TV go app. I have mailed the manager of this to get the episode added to the TV go box sets.
I've just checked and no, it hasn't been added yet.
Sorry to say this hasn't been added yet but I have chased this with the team to get this looked into further today.