"What About Bob?" is a very funny film starring Bill Murray as Bob Wiley, a highly neurotic psycatric patient and Richard Dreyfuss as Dr. Leo Marvin, his stuffy psychiatrist. Both do a great job in this picture, especially Murray, who I believe he plays his best comedic role in this film.
Dr. Leo Marvin is a successful New York psychiatrist who's about to appear on "Good Morning America" to announce his new book "Baby Steps". Bob Wiley is neurotic who sees to be afraid of everything. Bob is referred to Dr. Marvin by a colleague, who is incredibly relieved to have him off his back. Dr. Marvin is about to go on vacation so he can not really be bothered with Bob's problems for the time being and brushes him off. He gives Bob a copy of "Baby Steps" and tells him to read it and follow his advice until he returns from vacation.
Bob is badly in need of help, so he tracks Leo down to his vacation home and takes a bus there along with his beloved pet goldfish Gill, which he keeps in a small bowl and takes with him. Leo's neighbors, who are furious with him for buying their dream vacation home, tell Bob where he lives in order to annoy him. When Bob arrives, Leo is furious, but Bob befriends Leo's family, who are all very friendly to him.
Bob ends up spending the next few days with Leo's family, much to Leo's disappointment. He helps Leo's son Siggy overcome his fear of diving and goes out sailing with his daughter Anna and her friends. After Leo pushes Bob into the water, his family insists that he apologize to Bob and invite him over for dinner, which he does. Then a huge rainstorm begins, so Leo is forced to let Bob spend the night at his house, this being the night before his "Good Morning America" presentation.
The next morning, Leo tries to rush Bob out of the house before the TV crew arrives, but they arrive before he leaves. They want Bob to appear on the show, so Leo is cooped into letting him on the show, much against his wishes. Leo botches the show very badly, but Bob captivates the audience. After the show, Leo loses his temper and kicks Bob out of the house.
Leo figures the best way to get rid of Bob is to check him in to a mental health clinic, where he believes his associates will commit him. Instead, Bob ends up entertaining them with his humor, which they release him. Furiously, Leo picks him up and strands him on the road. But then Leo gets pushed over for speeding and he gets mud all over his suit. To make matters worse, it turns out that it's Leo's birthday and his family have prepared a surprise party for him.
When Leo returns home, his family and friends all come out to surprise him, including his beloved sister Lily from Chicago. But when Bob shows up and puts his arm around Lily, Leo loses it and tackles Bob.
Leo is now on the verge of collapse. A doctor comes over to treat him. The family decides it's better if Bob leaves before Leo recovers, so reluctantly Bob leaves. But Leo has been secretly planning to get rid of Bob once and for all. Leo sneaks out of the house, goes to the local store and buys some explosive. He then finds Bob, ties him down, places the explosives on him, and sets off a timer, calling all this "death therapy". Bob does not realize that Leo is really trying to kill him, thinking this is just a form of play therapy. But he manages to untie himself. Then he goes back into Leo's house, where he puts the explosives, and comes out to congratualte Leo on his death therapy. Shortly thereafter, the explosives go off, burning down the house. Leo's neighbors are outside fishing and excitedly chant, "Burn! Burn!"
Now Leo has a real breakdown. The movie ends with Bob marrying Lily. Leo finally recovers once the marriage vows are completed. Bob goes on to write a book called "Death Therapy" and Leo tries to sue him for the rights.