I tried having a sim go to a neighbors house and "Watch Movie Maraton" but that didn't seem to work. So I went to every house in my town (with a TV) and each house in the free neighboring town, i looked for "Watch Lord of the Sims Trilogy Marathon" and did not see this anywhere.
What am I missing?
full task:
"one of your Neighbors got the new Lord of the Sims Trilogy!
You should send one of your Sims to have a Movie Marathon at their house."
Is it a special house? Do I have to watch a marathon at each house-with-TV in the hopes of uncovering the right Marathon?
It seems like there are some tasks that cannot be fulfilled (I had similar problem with "sketch in a neighboring town" where I never could find the easle.