Jonathan babysits the Rugrats at Charlotte's house while she's on assignment, but uses this opportunity to look for Charlotte's tape so he could ""dig up dirt"" on Charlotte for blackmailing purposes. However, he has to do this while humoring Angelica, as per Charlotte's orders. Meanwhile, the Rugrats dig up dirt (the one used to make mudpies, that is).

Aunt Miriam is back; this time, we're visiting her place, as she, Grandpa, and her friends play poker. The Rugrats become scared of the old ladies when one of them jokingly commented that Chuckie was good enough to eat, and when Miriam recruited Chuckie to become her ""helper"" (which was genuine, but the Rugrats felt different).

Stu & Grandpa prepare a surprise birthday party for Didi. They had everything prepared except for one crucial element -- the birthday cake, which they forgot to get while rushing to get the party together. They take the Rugrats to Bob's Fully Automated Bakery to get the cake. While there, Tommy's gift to Didi, a frog, got away, prompting Dil to try and find it while the Rugrats try to rescue Dil before he becomes a cake. Meanwhile, Betty takes Didi to an English tea shop, where waiters sing songs for every occasion -- to the tune of ""Hail Britannia"".

The whole family is at the retirement home, visiting Grandpa and Lulu. While Grandpa shows the adults around, Lulu babysits the Rugrats; but once she's distracted, the Rugrats wreak havoc all over the place.

Lil tries emulating her prim and proper twin cousins from England, while Phil works to persuade her to stay messy like him. Also, Angelica pretends that she's American royalty.

Dil's first Christmas finds Santa Claus driven to quit the toy-giving business by Angelica, who's unhappy about her gift: a "dumb" reindeer doll. Elsewhere, the grown-ups get snowed in at a re-creation of a pioneer cabin designed by Stu.

The families go on a resort vacation, but are unable to relax when they're forced to share one room. Meanwhile, the babies look for treasure.

Chuckie's recurring dream is nowhere to be found.

Angelica orders a timid playmate to act as her errand boy.