The writers decided to bring in a babysitting plot with a dozen non-characters who are neither funny nor cute-in other words, annoying. And destructive. And I think the joke is supposed to be that there's no stopping them because they...somehow have to be in tow because Harley is suddenly idiotically taking them to inappropriate places. Like are they trying to write this for kids? There's even a fight involving pool noodles which somehow leaves opponents bloody. I'm not even kidding. And this is the A plot.
The B plot is a throwaway love story that is also an origin story-season 5 is a little late to introduce this. And frankly the antagonist of that story is pretty one-note, and kind of doesn't develop anyone or anything-just creates another useless villain.
Lake Bell is the stand-out actress but there's no saving this episode.
It's a shame that she and Aisha Tyler are wasted on this, the least-entertaining episode since "mashed-potato Harley."