 Although his appearance as a domestic pet is mostly a cover , Perry has nonetheless expressed care and devotion for the Flynn @-@ Fletcher family . In the episode " The Ballad of Bad Beard " , Perry managed to drag Candace out of the Dark Cave before it caved in because of Dr. Doofenshmirthz 's " self destruction button " that which Candace had accidentally pressed while under the orange moss hallucination , thinking it was a vending machine . He did this even though he knew that Candace saw that Perry was a secret agent talking to Agent E ( Eagle ) and to Major Monogram in a cracked egg . Candace thought she was just hallucinating because of the orange moss she accidentally touched earlier in the episode . Also , when an invention of Doofenshmirtz 's in the episode " Journey to the Center of Candace " might cause severe harm to Phineas and Ferb , Perry thoroughly beats up Doofenshmirtz and quickly handcuffs him . He then ties him to a pipe and , instead of just leaving him like he usually does in the series , calls for special forces from the O.W.C.A. to come and arrest the doctor , though they never show up . In " Oh , There You Are , Perry , " Doofenshmirtz is downgraded to a low threat level and Perry is reassigned to a new nemesis . This causes him to have to leave his home with the Flynn @-@ Fletchers , which makes him sad and he does not enjoy his new villain . Phineas and Ferb are fearful about where Perry could have gone to and put up several flyers around town for people to find him . They decide to throw a concert on the roof of a building , singing a song about how much they love Perry and want him to come home . Concurrently , Perry is reassigned to Doofenshmirtz again and returns to the brothers once more . 
 Although his appearance as a domestic pet <a href='drop_aux' title='1'><mark>is</mark></a>mostly a cover , Perry <a href='been_done' title='2'><mark>has</mark></a> nonetheless expressed care and devotion for the Flynn @-@ Fletcher family . In the episode " The Ballad of Bad Beard " , Perry managed to drag Candace out of the Dark Cave before it caved in because of Dr. Doofenshmirthz <a href='null_genetive' title='3'><mark>'s</mark></a>" self destruction button " <a href='null_relcl' title='4'><mark>that</mark></a>which Candace <a href='been_done' title='5'><mark>had</mark></a> accidentally pressed while under the orange moss hallucination , thinking it was a vending machine . He did this even though he knew that Candace saw that Perry was a secret agent talking to Agent E ( Eagle ) and to Major Monogram in a cracked egg . Candace thought she was just hallucinating because of the orange moss she accidentally touched earlier in the episode . Also , when an invention of Doofenshmirtz <a href='null_genetive' title='6'><mark>'s</mark></a>in the episode " Journey to the Center of Candace " might cause severe harm to Phineas and Ferb , Perry thoroughly <a href='uninflect' title='7'><mark>beats</mark></a> up Doofenshmirtz and quickly <a href='uninflect' title='8'><mark>handcuffs</mark></a> him . He then <a href='uninflect' title='9'><mark>ties</mark></a> him to a pipe and , instead of just leaving him like he usually <a href='uninflect' title='10'><mark>does</mark></a> in the series , <a href='uninflect' title='11'><mark>calls</mark></a> for special forces from the O.W.C.A. to come and arrest the doctor , though they never show up . In " Oh , There You <a href='drop_aux' title='12'><mark>Are</mark></a>, Perry , " Doofenshmirtz is downgraded to a low threat level and Perry is reassigned to a new nemesis . This <a href='uninflect' title='13'><mark>causes</mark></a> him to have to leave his home with the Flynn @-@ Fletchers , which <a href='uninflect' title='14'><mark>makes</mark></a> him sad and he <a href='uninflect' title='15'><mark>does</mark></a> not enjoy his new villain . Phineas and Ferb <a href='drop_aux' title='16'><mark>are</mark></a>fearful about where Perry could <a href='been_done' title='17'><mark>have</mark></a> gone to and put up several flyers around town for people to find him . They decide to throw a concert on the roof of a building , singing a song about how much they love Perry and want him to come home . Concurrently , Perry is reassigned to Doofenshmirtz again and <a href='uninflect' title='18'><mark>returns</mark></a> to the brothers once more . 
Although his appearance as a domestic pet mostly a cover , Perry done nonetheless expressed care and devotion fir the Flynn @-@ Fletcher family . In the episode " da Ballad of badd Beard " , Perry managed to drag Candace outt of the Dark Cave before it caved in because of Dr. Doofenshmirthz  " self destruction button " which Candace done accidentally pressed while under the orange moss hallucination , thinkin it was a vending machine . He did dis even though he knew that Candace saw dat Perry was a secret agent talking to Agent E ( Eagle ) and to Major Monogram in a cracked egg . Candace thought she was jus hallucinating becuz of tdaorange moss she accidentally touched earlier in thdapisode . Also , when an invention of Doofenshmirtz  in the episode " Journey to the Center of Candace " mite cause severe harm to Phineas and Ferb , Perry thoroughly beat up Doofenshmirtz and quickly handcuff him . He then tie him to a pipe and , instead of jjusleaving em like he usually do in the series , call for special forces from thedaW.C.A. to cum and arrest the doctor , though they never show up . In " Oh , There uu , Perry , " Doofenshmirtz is downgraded to a low threat level and Perry is reassigned to a new nemesis . This cus hemto gotta leave his home with the Flynn @-@ Fletchers , which make him sad and he do not enjoy his new villain . Phineas and Ferb fearful about where Perry could done gone to and put up several flyers around town for people to find hiem They decide to throw a concert on the roof of a building , singing a song about how much they luh Perry and want him to ccumhome . Concurrently , Perry is reassigned to Doofenshmirtz again and return to the brothers once more .