Labradoodle Mitzi is rushed in after being hit by a car; Professor Noel Fitzpatrick is concerned she could have nerve damage and Sheila and her daughter Catherine fear the worst.

Marley the dog is admitted to the clinic with severe dysplasia of the elbow; A Rhodesian Ridgeback has a high-risk operation, and Noel treats an old gym buddy's injured dog.

A boxer needs stem cell scaffolding; a convoy of hedgehogs arrives with broken legs; a kitten is brought in with a broken leg after an accident.

Caroline arrives at Fitzpatrick's with fourteen of her rescue dogs, including Cookie, a tiny 4-year-old Papillon; Cookie has developed polyarthritis that has destroyed the cartilage in her elbows.

A pug needs surgery on his elbow; a border collie has a leg pain that's proving hard to diagnose.

Wilson, a three year-old from Newfoundland, is struggling to walk on his severely bent front legs; he's already undergone several operations, but so far no vet has been able to successfully straighten his legs; this could be Wilson's last chance.