Developer Kan Gao released the first free *shudder* 'minisode' for To The Moon at around this time last year, and now another has been released, completely free. While it's the same sort of length as the first (around 20 minutes), Gao suggests that this one is "a tad more...important, plot-wise". Once again, you're stuck in a hospital playing as the two main scientist characters of To The Moon, as protestors do protesty things outside.
If you own To The Moon on Steam, you should find that the DLC has already been registered to your account. Otherwise, you can download it here. You don't need to own TTM, but it will probably make more sense if you've played that first.
With Sigmund Minisode 2 out of the way, Gao will be resuming work on To The Moon's full-fledged sequel, Finding Paradise. Meanwhile, one of Freebird's pixel artists, Jordan, is still in hospital undergoing chemotherapy; if you'd like to help out with either kind words or donations, there are details of how you can do so here.