S05Ep04 - Red Letters = POQUE (an old French card game believed to be the predecessor to Poker)

S05Ep03 - Red Letters = MOLECULAR GASTRONOMY (the scientific approach to preparing food from the perspective of chemistry)

S05Ep02 - Red Letters = FRANCIS RYND  (An Irish physician credited with being the first to use a hypodermic needle to inject a human patient on June 3, 1853)

S05Ep01 - Red Letters = THE SEACOOK (a gimbal style boat stove)