The fourth season begins with the revival of a well-known restaurant chain that didn't turn out like two business partners planned.

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A Milwaukee-based chain of soup restaurants needs professional help after its co-owner's sudden passing.

A charity-centric watch business suffers from a rushed process, unfocused branding and emotional baggage.

A Chicago catering company needs help after suffering a steep drop in sales and an owner who vents his frustration on the employees.

The owner of a cleaning product line is putting her business at risk with aristocratic marketing, high prices, and an unwillingness to face reality.

A Los Angeles furniture company struggles with old inventory and quality control.

A father and son with a broken relationship are leading their tea shop franchise into dangerous territory. If Marcus can't get them to separate their business and personal lives, tea time will be over... for good.

A beloved kitchen supply store in Manhattan faces extinction after its owners' divorce. If Marcus can't figure out a way to get them working together, the deal may go up in smoke.

A Mexican-American's tortilla business is being decimated by big competitors. Marcus will team up with George Lopez and the owner to develop products and make this American dream a reality.

Marcus helps a Manhattan-based fashion designer who is failing because she lets her family and co-workers overpower her.

A family-run swimwear company struggles to connect with consumers due to poor leadership, outdated designs, and misguided processes.

A Chicago snowboard shop goes downhill after its owners try to expand too quickly and stop communicating with one another.

Marcus helps a family-owned hair care company that reached a breaking point because of the father's costly side projects.

Marcus helps a sound-proofing company, started by two best friends, which has so little cash they must rely on unpaid volunteers.

Marcus helps a California entrepreneur who went all-in on a coffee business with no prior experience and got in over his head.

Marcus helps a gelato popsicle company whose owner jumped the gun by starting a franchise business and now suffers from a waning work ethic.

A family-owned chocolate shop was started by three siblings in support of their chocolatier father; despite circumstances becoming desperate, the family is resistant to change.

Marcus Lemonis shares his top 10 most important rules for success while sharing key moments of past episodes.

Marcus Lemonis travels throughout California, where a new law will soon allow any adult to buy cannabis legally, and profiles several pot entrepreneurs, from small-scale startups to multi-million-dollar ventures.