It was Foster's actually, episode: "My so called wife"
I didn't see this episode until much later on after it aired. No one really talked about it much so I didn't really find a strong sense or need to go and watch it. However I did see it and I have to say it was a very good episode.
The plot was pretty over done with the "teach em class for this one hair brained scheme to make cash", but the whole segment with Mac and Frankie trying to teach Bloo sarcasim was genius. I mean really, it would be hard to actually explain it to someone when you think about it.
The best part though was easily the fact the rich guy turned out to be a wacko and everyone got screwed and suckered by the guy. Oh, and Mr. Herriman buying jet cars is certainly something worth snickering at
.