1978–1982: First series and Circus Bassie en Adriaan

In January 1978, TROS released the first series of Bassie & Adriaan, titled De avonturen van Bassie en Adriaan (The adventures of Bassie and Adriaan). With its crossover potential, the series became the most watched children's series of the first half of 1978.^[4] As a result, the show was soon renewed for a second season, which received just as high viewing figures. Within the space of two years, three series were shot and released.

In 1980, Joop van den Ende founded a circus around the duo and toured with it throughout the country. The circus proved popular in its first year and sold out nearly every single show.^[5]

1982–1987: Closure of the circus, split from Joop van den Ende, split from and return to TROS

After the release of De huilende professor in 1982, TROS saw the appreciation ratings for the series go down and proposed the Van Toor brothers to put the series on halt for a year to give the older series more time to be rebroadcast. Bas van Toor claimed that TROS did not want the brothers anymore, while the head of entertainment of the broadcaster stated that the brothers were allowed to go to other broadcasters if they pleased.^[6]

Meanwhile, the brothers Van Toor also ended their long-term collaboration with producer Joop van den Ende after he left in his position of director at Circus Bassie & Adriaan, which left the brothers taking over the daily management of the business. The brothers were soon overworked and let the circus collapse in favour of their own well-being.^[7] On top of that, the costs had outweighed the earnings.^[8]

They then started their collaboration with Belgian broadcaster BRT, for which they produced several mini-series. BRT was also interested in commissioning a long series with proper episodes.^[9] In 1985, TROS commissioned a new series by the duo, which made their return to the TROS official.^[10]

1987–1996: Later series

In 1987, the first of their self-produced series, which consists of five seasons, was released: Het geheim van de schatkaart (The secret of the treasure map). It quickly became the most appreciated television program of the Netherlands with an average of 7.7 out of 10. Its premiere on 9 January 1987 received a 7.6 and amassed to an audience share of 11%, outscoring other popular television programmes for adults. As a result of the success, the brothers received a contract to produce two more seasons. All of the self produced seasons feature the Baron as the primary antagonist. In the first three seasons, his accomplices are Vlugge Japie (quick Japie) and B2. In the first episode of season 4, the three crooks are released from prison. B2 apparently did not hear that they're free and is still in his cell (which the Baron decides is fine). Vlugge Japie, sick of the Baron's obsession with Bassie and Adriaan, decides to abandon him. The Baron searches for a new hiding place, he decided to steal a yacht. In this yacht he makes a phone call, this is a key moment, since it's the first time the Baron reveals his (last) name, up until now, he only was know as De Baron. The Baron hires two new criminals, the explosives expert Handige Harry (Handy Harry) and a spy only known by the code name B100. These two are his sidekicks for the final two seasons.^[11]

1997–2003: Farewell tour and Aad van Toor's illness

In October 2002 Bassie & Adriaan announced their farewell tour. The final show, planned for January 4, 2004, was to include a guest appearance by the three crooks, however the tour prematurely ended on July 31, 2003, as Aad van Toor was diagnosed with cancer.^[12] At the end of the last show, when his relatives brought him flowers, he burst into tears. "You want more?" he asked as usual. "Well so do I, but unfortunately I'm sick. I have to go to hospital".

2003–present: Film appearance and revived success

In 2003, the Dutch branch of Nickelodeon bought the rights to show several seasons of Bassie & Adriaan series on their channel. These reruns proved a success as it quickly became the channels most watched programme at the time, collecting almost half a million viewers per episode. Aad van Toor hosted a special 24-hour marathon of episodes for the channel on New Year's Day 2004.^[13]

In September 2014, the show's theme song "Hallo Vriendjes" became a viral internet sensation when Dutch teens and students challenged their international friends to sing along to the lyrics.^[14]

In 2015, the Van Toor brothers played Bassie and Adriaan in the picture Keet&Koen en de speurtocht naar Bassie & Adriaan.

In 2019, their production company started uploading their episodes on YouTube, after they had registered a channel in 2012. This proved popular, as their old episodes got over 90 million views all together. It led Veronica's Superguide joke that "you do not have to young and handsome to become a YouTube success".^[15] The brothers stated that they initially had wanted to sell their series to Netflix, but that Netflix had rejected them because of the series' poor picture quality.^[16]

The Van Toor brothers were in a long-term legal battle with actor Paul van Gorcum, who played the Baron in several series. Together with three other actors, they sued the Van Toor brothers over their own right on royalty payments for the series produced with Joop van den Ende.^[17] In 2020, the Rotterdam district court ruled that Van Toor brothers had to pay damages of €15,000 in total to four actors including Van Gorcum.^[18] This sum was significantly less than the claimed €193,000. The district court ruled that the actors had been underpaid but that the claimed sum was disproportional to the screentime that the actors had had in series.^[19]