Fantastic Boyage (A.K.A. Doggone Germs) is the third part of the 7th episode of season 2, which aired on August 27, 1997. In this episode, Dee Dee comes down with the common cold, and Dexter tries to find a way to cure her.
Dexter tries to inject himself into Dee Dee to find a cure to the common cold, but mistakenly ends up inside his dog. He thinks Dee Dee has been infected with a dog virus. He is then mistaken for the first human virus to infect a dog by the vet.