i love everyone's waiting, the pilot, and ecotone (YES!).

but i don't remember which episodes these others are...
 

the trip - nate, david and tagalong brenda go to las vegas for a conference while frederico has to deal with a baby's funeral

knock knock - final episode of season one. someone finally asks "why do people have to die?" and nate has the perfect answer

i'll take you - second last ep of season two. nate and brenda have the nastiest argument ever commited to film