In this episode the Seavers have five bedrooms. But when Luke moves in a few seasons later they only have four.
Jason: ...Carol, how would you feel if there was no Mike? ...And Ben, how would you feel if there was no Carol? ...And Mike, how would you feel if there was no--Don't you say a word to spoil this, buster!
Ben: "First month's rent is free," it says here. They all say that...! Only the first month is rent-free? No sweat, I'll just move every thirty days.
The German episode title is "Wozu sind Babys gut?", meaning "Why Are Babies Good?"
This episode's title comes from Howard Hawks' 1938 movie Bringing Up Baby, starring Cary Grant and Katharine Hepburn.