S1·E9 Park Rage

A spat between Wendy and a young boy leads to an altercation between her mom and his---and a showdown between the dads. Wendy has her first encounter with a bully while at the park playing. She leaves behind her collector cards and when she goes back to get them, they're missing, and she's convinced that Timmy, the bully, took them. Jimmy offers to go back to the park with Wendy to ""rough him up"" a little but Donna decides to handle it in her calm manner. While at the park confronting the culprit, Donna ends up losing her cool with the kid and his mother later shows up at the house to ""address"" Donna. The rage continues and Jimmy steps in, offering to meet with the father and ""do whatever he has to do"" to get those cards back. When the gentlemen meet, we discover that neither is cut out to fight anyone.