Klaus crashes into the same garbage truck featured in Garbage Stan (2017), the Sidewinder XTR, which is also the same garbage truck Klaus has a poster of hanging on the wall of his "alcove".
Episode seems to be based/parodied off the drama/fantasy film The Lighthouse (2019) starring Robert Pattinson and Willem Dafoe as two lighthouse keepers on a remote island in the 1890's who become stranded on the small island due to a severe storm, and struggle with getting along and maintaining their sanity due to extreme isolation.
There are no opening credits with singing in this episode.
Roger and Klaus appear only very briefly.