Mika's move to Finland was certainly a shock to a lot of people, but the bigger shock was learning his beautiful wife, Jennifer, was not going to go with him and they were not getting divorced.
The decision was actually a very wise one, but is still nonetheless difficult to understand. Although Mika's already talked about his reason, her perspective is way more interesting, as is typically the case.
Oh, and if you're wondering about the photo for the episode, that's Jennifer participating in the Mid City Gras parade! She was dressed as a flying squirrel and was riding a trike. Ain't she the coolest!