From Lena Dunham's new Netflix rom-com, set in London, to the return of Michael C Hall's murderous Dexter and a stunning new wildlife series.

Long-running series don't often die; they just give us spinoffs. Seven seasons of Bosch, with Titus Welliver as a Los Angeles police detective, led to three seasons of a sequel series, Bosch: Legacy, and now Ballard. Action star Maggie Q plays Detective Renée Ballard, who was introduced as a homicide detective in the final episode of Legacy. In her own series, which like Bosch is based on a series of popular novels by Michael Connelly, she has been reassigned to lead the LAPD's cold case unit – housed, as most cold case units on television are, in a dingy basement. Her ragtag staff is made up of reserve police and volunteers, but they soon have to tackle serious old crimes as they search for a serial killer and investigate the death of a John Doe. Welliver's Harry Bosch turns up regularly to consult on the cases, which, true to the detective genre, often put Ballard in danger.

Ballard premieres 9 July on Prime Video internationally

Lena Dunham has always been best when mining her own life for material, as she did directly in her first feature, Tiny Furniture (2010), loosely in the series Girls (2012-2017), which became a cultural touchstone – and now in this brash, funny new series, co-written with her husband, British musician Luis Felber, and inspired by their relationship. Megan Salter (Kayla in Hacks) is the ideal Dunham alter ago as Jessica, a New York television producer whose long relationship has ended. She flees to London, hoping to have the kind of romance that only exists in Richard Curtis movies. Will Sharpe (from the Sicily season of The White Lotus) plays Felix, an indie musician who turns out to be the unexpected man of her dreams. Much of the humour comes from their well-played British-American cultural differences. Dunham directed the show, and plays Jessica's depressed sister, with Rita Wilson as their mother and Rhea Perlman as their grandmother. Richard E Grant plays her British boss among a dream list of guest stars, including Andrew Scott, Naomi Watts and Rita Ora.

Too Much premieres 10 July on Netflix internationally

The title of this family-friendly musical series is the name of a fictional pop group that became the world's biggest band, despite its cringey name. The story goes back to when the three girls in the group, named Posey, Jade and Tulip, met in middle school, and it traces their rise to fame. Their popularity comes as a thrilling surprise to them. The more surprising thing for us is that the theme song and the music for the pilot episode were written by Diane Warren, a regular Oscar nominee with 16 Best Song nominations and no wins yet. Her music doesn't exactly suggest a YA demographic, but that is the likely audience for this Disney show, which is the earnest flipside to recent, irreverent girl-band series like Girls5eva and We Are Lady Parts.

Electric Bloom premieres 10 July on Disney Channel and 17 September on Disney internationally

Nature shows are perennial favourites with viewers, and the wrinkle in this series is that a trio of explorers heads into remote areas around the world to find endangered species, capturing them on film to help scientists study and preserve them. In Malaysia they look for the rare and beautiful Malaysian tiger, in Indonesia........

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