You can still have a pretty good idea of what the episode was conveying and still not really find it a particularly strong entry. You can almost certainly skip that episode and still be able to follow the upcoming plot, which I think qualifies it as 'filler'.

Comments

In many ways the weakness of the episode for me comes in the context of the season. It's the third time we've ended an episode assuming we get to find the result of Mark reintegrating only to have the episode not follow on. This episode is also the second time in a row for that build up-redirect