While You Were Sleeping - S3.E9

Mangled Metal needs to rehearse and finish a new song for an important performance that night. So Sharon runs a seemingly simple errand for the band while an exhausted Maria gets some well-deserved rest. Unfortunately Sharon has to baby-sit David's twins while she does the errand and she botches it. Then the band starts to argue amongst themselves and it looks as if they'll break up before that night's performance. But rather than wake Maria up, Sharon scrambles to undo all the damage so her friend can get some much-needed sleep.