Aspiring architect Tom Thompson is told by mysterious Ruth Abernathy that his best friend, "Bill," has taken his own life. Except that Tom has never met Bill and neither have his incredulous friends. So when Tom foolishly agrees to give the eulogy at Bill's funeral, it sets him on a collision course with Ruth -- who is revealed to be Bill's oversexed mother -- and Julie DeMarco, the longtime crush Tom hasn't seen since they were teens.
Hyman Goldberger, the president of film studio Super-Colossal Pictures, is in trouble--his major backer is threatening to stop financing his pictures. He finds a group of six wealthy individuals who may want to become investors in the studio if his disgruntled backer pulls out. Unfortunately, his bumbling runner Albert picks that day to invite six of his street musician friends to be in the film that is currently shooting at the studio, and Hyman mistakes them for the potential investors. Complications ensue.
When his boss is killed, Detroit cop Axel Foley finds evidence that the murderer had ties to a California amusement park called Wonder World. Returning to sunny Beverly Hills once more, Foley reunites with Detective Billy Rosewood to solve the case. Along with Billy's new partner, Detective Jon Flint, they discover that Wonder World is being used as a front for a massive counterfeiting ring.
The rich, aristocratic Katarina Hassel have an architect renovate her mansion. Katarina fall in love with the young architect, Gunnar Stenwall. Alas, he doesn't fall in love with her. But perhaps if Gunnar would meet her identical sister, who works in Stockholm as a waitress, he would fall in love with her instead? So Katarina travels to Stockholm to act as her non-existing sister.
An American gets a ticket for an audience participation game in London, then gets involved in a case of mistaken identity. As an international plot unravels around him, he thinks it's all part of the act.
Uptight lawyer Peter Sanderson wants to dive back into dating after his divorce and has a hard time meeting the right women. He tries online dating and lucks out when he starts chatting with a fellow lawyer. The two agree to meet in the flesh, but the woman he meets — an escaped African-American convict named Charlene — is not what he expected. Peter is freaked out, but Charlene tries to convince him to take her case and prove her innocence. Along the way, she wreaks havoc on his middle-class life as he gets a lesson in learning to lighten up.
An outgoing young girl and a square stockbroker meet on a park bench in Boston and are mistaken for international spies and chased by both sides.
A Bronx working girl is drawn into an elaborate extortion plot after being kidnapped by a gang of sophisticated con men who force her, because of her remarkable resemblance, to impersonate a wealthy socialite. Based on E.V. Cunningham's (Howard Fast's) novel, "Shirley."
Comic mayhem ensues when two lovely blondes, Dee and Dawn, are mistaken as international mob killers.
Marsha Meredith, an attorney-at-law, is nominated for a federal judgeship, but her nomination is opposed by a 'Good-Government' group that thinks her divorce makes her unfit for the job. This evolves into situations, happening in Florida, New England, Washington D.C., and the Adirondacks, such as the misunderstood husband trying to win back his wife, and the misunderstood wife trying to make her husband jealous, and one case of mistaken identity after another, after another.
A case of mistaken identity forces a Federal agent and a dental supply salesman to team up as they speed through the streets of Detroit to pull off a sting operation and solve the murder of the agent's former partner.
The two brothers Trinity and Bambino are exchanged by two federal agents and take advantage of the situation to steal a huge booty hidden in a monastery by a gang of outlaws.
Longtime school sweethearts discover married life, thanks to a disagreeable live-in mother-in-law and pressing business obligations, is more rocky than idyllic.
Shop owner Alice Chapman is nervous to meet her future in-laws at Christmas, especially because she is arriving ahead of her new fiance Will Mitchum. Alice's trip becomes more stressful when her luggage is lost and her phone is damaged, leaving her no way to find Will's family!
Old Mother Riley falls into money so goes to Paris, where she is mistaken for a spy.
Highly intelligent computer major Zoey Miller is uninterested in romantic love, but her life is turned upside down when Zack, the school's soccer star, gets amnesia and mistakes Zoey for his girlfriend.
Fast-talking, quick-thinking Detroit street cop Axel Foley has bent more than a few rules and regs in his time, but when his best friend is murdered, he heads to sunny Beverly Hills to work the case like only he can.
Showman Jerry Travers is working for producer Horace Hardwick in London. Jerry demonstrates his new dance steps late one night in Horace's hotel room, much to the annoyance of sleeping Dale Tremont below. She goes upstairs to complain and the two are immediately attracted to each other. Complications arise when Dale mistakes Jerry for Horace.
When a Harvard-educated CIA agent is killed during an operation, the secret agency recruits his twin brother.
Striving to be like all the high-class dogs in their fine coats, a little hairless pooch borrows a black and white fur coat of her owner, not realizing it makes her appear to be a skunk. Once she has it on, she finds everyone fleeing from her - everyone, that is, except for the amorous Pepé Le Pew.