Fans of the series often look for details on these specific episodes in IMDb to see technical credits and plot summaries. A Pager, a Club and a Cranky Bag of Wrinkles
The brothers find rare common ground when they decide to mine for platinum . Sheldon discovers that the gravel found on the side of the road contains trace amounts of the precious metal due to exhaust from catalytic converters. The pair attempts to extract the platinum using a high-heat oven at school, leading to the classic comedic friction between Sheldon’s scientific precision and Georgie’s entrepreneurial greed.
Regarding the plot of Season 3, Episode 14, I found that it's titled " Baseball, Cars, and a Bungalow". In this episode, Sheldon's family helps him deal with the consequences of his actions, and he learns some valuable lessons about friendship and loyalty.