Goof: When Didi got to the ATM machine and inserted her ATM card, Tommy pushes the buttons at random, which causes the ATM to spit out her card in shredded pieces. Normally, if ANYTHING suspicious happens to a card, like delinquent payments, or too many invalid PIN numbers in a single session, the ATM just "impounds" the card by not returning it to the customer; it's usually stored intact in a special hold area of the ATM.
Goof: In a flashback, Tommy recalls a time (probably when he was only a few weeks old) when Didi carried him to the refrigerator in the middle of the night, so he can have milk. Before she turns to open the fridge, we see her cat clock on the wall. However, she did not get that clock until the "Mirrorland" episode, which at the time, Tommy is already one. (Special thanks to Brian Carlson)
Goof: In "Let There Be Light", they find out it's in the fridge so they try to open it. Spike comes and bites Chuckies pants and pulls him. The pants rip and the fridge opens. Stu finds the babies and gives Chuckie to Didi and you can see that the pants are perfectly fine.
Officer: Not so fast, you two!
Mr. Loew: (as the "examiners" are being arrested) But-but-but officer, what's the meaning of this? These men are bank examiners!
Officer: Bank examiners? HA! These two are the most notorious bank robbers in the whole country! We've been after 'em for years! (Mr. Loew gasps) Thank goodness someone had the foresight to trip the alarm, or we might never have caught them.
Mr. Loew: (takes the briefcases full of money back)> You!
Stu: And Stu said, let there be light!
Bank Robber: I don't know where we went wrong. Should have been as easy as taking candy from a baby. (Scene shows Tommy and Chuckie eating lollipops)
Didi: Stu, all the lights in the house are off.
Stu: I'm aware of that, Deed.
Mrs. Throckmorton: I don't keep my savings in cockamamie stocks and bonds, but in diamonds and rubies that will last forever!
Title: The Bank Trick is a take on the movie, "The Bank Dick", starring W.C. Fields.
Stu: And Stu said, "Let there be light!"
This is a reference to the Bible. When "God created" the sun, it says, "And God said, 'Let there be light.'"