Randall

This unnamed man is Penny's brother. Apart from Penny, he has another unnamed sister, and he is the only son of Wyatt and his wife. He has not yet appeared in the show and has only been mentioned.

In "The Dumpling Paradox, Penny says that her friend Christy Vanderbel was engaged to her (Penny's) cousin while she was sleeping with her brother.

In "The Pirate Solution" (S03E04), it is revealed that he works in a meth lab and is described as a 'kind of chemist' and Penny told Leonard that Leonard would like her brother.

In "The Rhinitis Revelation" (S05E06), Penny asks God to make her brother stop cooking methamphetamine but without involving the police when Sheldon's mother decides to get them to pray at a church

In "The Status Quo Combustion" (S07E24), Penny wants to schedule her wedding 12 to 18 months away so her brother can attend after he gets out of prison.

In "The Bachelor Party Corrosion ", Penny's father tells Penny that her mother is out with her brother celebrating one month of being sober. He had also received his 10th one-month-sober chip.