first series they were zoo keepers and the second series they are musicians
they always have crazy adventures like one of the main characters heroes went missing in a part of the zoo and when they found him his head had turned into cheese ahaha and they had to kill him with a cheese grater ahahaha
"howard you know the black bits in banana's are they tarantula's eggs" rofl best episode ever and for the ppl who dont know what im talking about i must sound like a complete idiot