(Strip Number 767, Original Publication Date, 18 December 1984)
Panel 1: As our story continues, we find John about to perform a check-up on someone who looks a lot like Ted. As he's just about to get started, Helène tells him that Jean has had a very bad bout of morning sickness and thus cannot come in.
Panel 2: John reacts to this reverse by thought-bubbling "GREAT! I come into work with no assistant AND a cast on my foot!!"
Panel 3: He then thought-bubbles "Oh well, here goes" and sprays the patient with the oral irrigator BEFORE telling him to open his mouth.
Panel 4: The patient reacts to John's mournful "Why ME?" by saying "Whaddaya mean, why YOU??"
Summary: The reason John made this blunder is that he went on auto-pilot and acted as if Jean were there. Since she isn't, he should probably have either called in a temp or stayed home to be with his 'loving' family.