<P> Dr. Harris (Cooper Thornton) is a doctor who works at the hospital with Ann Perkins . He has an extremely sarcastic personality and responds to everything in a deadpan manner . He first appeared in the first season finale "Rock Show", where he tended to Andy Dwyer, who broke his legs falling into a construction pit . He appeared again in "Greg Pikitis", where he attended Ann's Halloween party dressed as a doctor . When the party proves boring, Dr. Harris left early and took the bottle of wine he brought to Ann's party because no one drank it . Dr. Harris tended to Andy again in "Freddy Spaghetti", after Andy was struck by a car while riding his motorcycle . When Andy asked whether Dr. Harris can have him fully healed in the next 10 minutes, the doctor sarcastically responded, "Sure, I'll just advance medical science 30 years ." He also appeared in the third season finale "Li'l Sebastian", where he treated Chris Traeger for a case of tendinitis . Chris responded to Dr. Harris' sarcasm by declaring him "literally the meanest person I have ever met ." </P> <P> Jean - Ralphio Saperstein (Ben Schwartz) is the idiotic and cocky friend of Tom Haverford who, like Tom himself, fancies himself a pickup artist and baller, although he is looked upon with contempt by most people around him except Tom . He tries to dress stylishly, makes up and raps spontaneous rhymes and often speaks in slang terms such as variations of the suffix - izzle as popularized by rapper Snoop Dogg. Jean - Ralphio is first introduced in "The Set Up", when Tom brought him in for an interview to be Ron Swanson's new assistant; he was quickly rejected . Jean - Ralphio contributed $5,000 when Tom was seeking a $10,000 investment in the Snakehole Lounge nightclub . In the third season finale, "Li'l Sebastian", Tom quit his city hall job to form an entertainment company with Jean - Ralphio called Entertainment 720 . The role of Jean - Ralphio was created specifically for Schwartz because the Parks and Recreation producers liked the actor so much . </P> <P> Justin Anderson (Justin Theroux) is a lawyer and long - time friend of Ann who briefly dated Leslie . He is very charming, regularly travels around the world and has done many extravagant things, such as mountain climbing . He loves telling entertaining stories, and sometimes seems less interested in the people around him than he is in listening to and learning new stories . Justin and Ann never dated, but she seems to secretly harbor romantic feelings for him, something that caused difficulties between Ann and Andy when they were dating . Justin first appears in "The Set Up", when he provided legal advice to the Parks and Recreation department, and Leslie developed a romantic interest in him . She asks Ann to set them up, but she hesitated to do so, prompting Mark to accuse her of still having feelings for Justin . Ann finally sets up a date, and the two start dating regularly . Impressed by Justin's worldliness, Leslie was so determined to impress him with a house party that, in "Leslie's House", she abused her government power by recruiting town employees to provide entertainment . Justin made his final appearance in "Galentine's Day", when Justin and Leslie tried to find Frank Beckerson, the long - lost love of Leslie's mother Marlene, and reunite the two . Upon finding him, Leslie quickly realized Frank is too strange and tried to call the plan off, but Justin insisted on going through with it . After the evening ends disastrously, Ron points out to Leslie that Justin is a selfish person who only cares about getting more stories, so she breaks up with him . Tom, who strongly admired Justin's hipness and idolized him, became extremely disappointed by the break - up and reacted like a child whose parents are divorcing . </P> <P> Li'l Sebastian is a miniature horse, who debuted at the Pawnee Harvest Festival in 1987, as an instant sensation . That week he was the eighth most photographed item in the United States . He also received an honorary degree from Notre Dame . Leslie brings him back for the Harvest Festival in season three, although he was much older and had many ailments, including cataracts, diabetes, and arthritis . His return brought excitement and joy to all of Pawnee, except for Ben, who didn't understand what made him so special . In the season three finale, Li'l Sebastian dies, and everyone is devastated . Leslie used Tom's company, Entertainment 720, to give Li'l Sebastian a funeral . Andy then writes the song "5000 Candles in the Wind" to honor Li'l Sebastian . </P>

Who plays the lawyer in parks and rec