The Vartabedian Conundrum - S2-E10
Continuity mistake: When Leonard and Penny are talking in the dryer room, the size of the towel Penny is folding keeps changing. (00:15:00)
The Vartabedian Conundrum - S2-E10
Continuity mistake: When Sheldon is talking via the laptop, the amount of letters in the words he says is different to the amount of keys hit.
The Vartabedian Conundrum - S2-E10
Continuity mistake: When Stefanie and Leonard are talking in bed towards the end, Stefanie's arm moves from on her head to on her pillow instantly. (00:16:30)
The Vartabedian Conundrum - S2-E10
Visible crew/equipment: When Sheldon and Leonard are making breakfast, stage lights are reflected off a milk bottle.
The Vartabedian Conundrum - S2-E10
Continuity mistake: When Sheldon is told that he can't talk, he goes from sitting to standing instantly.
The Vartabedian Conundrum - S2-E10
Continuity mistake: When Stephanie asks Leonard why he hasn't told her about Penny, he spills some of the pancake mixture out of the bowl he is stirring. In some shots the spilled mixture vanishes and the appears again.
The Vartabedian Conundrum - S2-E10
Continuity mistake: When Leonard, Raj and Howard are talking about Leonard's new trousers, the items on the tray behind Howard keep changing.
Chosen answer: The song is called "Dark as a Dungeon" and was written and first performed by singer-songwriter Merle Travis in 1946. It has been performed by a wide array of artists, including Tennessee Ernie Ford, Harry Belafonte, Dolly Parton, Queens of the Stone Age, Kathy Mattea and Amy Grant. But it was made most famous when it was performed and recorded by Johnny Cash during his concert at Folsom Prison in 1968. According to Wikipedia: "It is a lament about the danger and drudgery of being a coal miner in an Appalachian shaft mine. It has become a rallying song among miners seeking improved working conditions."
Michael Albert