The Very Long Night of Londo Mollari - S5-E2
Corrected entry: When Doctor Franklin tells Sheridan about Londo, he says that the Centauri have a bipulminary system. The correct term would be bicardiary system. (Pulminary has to do with the lungs, cardiac/cardiary has to do with the heart.) (00:10:10 - 00:11:00)
Correction: For the Centauri, their two hearts do everything our lungs and kidneys do. Londo refers the 'cardio respiratory system' when poisoning Refa.