Nightfall?

 is a limited time premium side questline released on January 21st, 2016 with the Deep Space Homer 2016 Event. When complete, Comic Book Guy and Skinner get a new permanent task at the Springfield Observatory.

Quest
* Characters: Lisa, Comic Book Guy, Skinner

** Only appears if player has Professor Frink

End
"New permanent jobs at the Springfield Observatory available for Skinner and Frink."

- System Message

Trivia

 * Despite what is stated in the System Message, Comic Book Guy and Skinner, were the characters that got a new job after the quest line.
 * A patch on January 28th made the quest line job for Professor Frink permanent.