"The Ties That Bind" is the 96th episode of Casualty and the 16th episode of the 7th series.
Nikki tells Ash she is pregnant. A divorced father kidnaps his daughter but has to take her to the hospital when she falls ill. A woman is brought in with a fractured wrist: When her husband arrives, he discovers the female colleague who accompanied her is actually her lover. Jerry is supposed to be getting married but his best man Don is hungover. While trying to sober him up, Jerry stops Don walking into the water but Don punches him, causing him to hit his head. At the hospital, Don admits to Jerry's fiancée Lynn that he is in love with her. Duffy is annoyed when Charlie tells her the locum consultant is Andrew Bower, her ex-boyfriend and the father of her son Peter.