Agent D is a dog, his first name is unknown, not much is shown of him but he was seen in "Traffic Cam Caper". He was injured, along with Agent O by Dennis, the rogue agent, and had his right arm/paw in a sling ("No More Bunny Business"). He was also helping Carl with a drawing of Dennis.
Physical appearance Edit
Agent D looks like a generic brown dog. He is possibly a hound, beagle, pointer, or smooth fox terrier.
- "Traffic Cam Caper"
- "It's About Time!"
- "No More Bunny Business"
- "Phineas and Ferb Christmas Vacation!"
- "Robot Rodeo"