Main Range

The Monthly Adventures, previously called the Main Range or Monthly Range, was a Doctor Who audio series produced by Big Finish Productions.

The series began in 1999 with The Sirens of Time, a multi-Doctor story featuring the Fifth, Sixth, and Seventh Doctors. It also featured the Eighth Doctor from Storm Warning in 2001 until 2012, when he moved to his own series of audios, the Eighth Doctor Adventures.

Stories in this range were typically narratively independent from each other, though sometimes Big Finish made stories part of trilogies, larger story arcs, or tie-ins to their other ranges, such as Dalek Empire and Cyberman. One such example was 1963, a trilogy of stories set in the year 1963 and released in 2013 to celebrate Doctor Who's 50th anniversary.

From The Sirens of Time to The Lure of the Nomad, all releases used the 1996 variation of the Doctor Who logo. Starting with Iron Bright, the series' 239th release, the version of the logo introduced in 2018 started being used. This marked the first instance of Big Finish using the "current" Doctor Who logo since the show's revival in 2005.

The Monthly Adventures included stories with all of the Doctors' television companions, including Adric, Nyssa, Tegan, Turlough, Kamelion, Peri Brown, Melanie Bush, and Ace, as well as their companions from non-televised media, such as Frobisher, Maxwell Edison, and Izzy Sinclair from Doctor Who Magazine comic stories, Bernice Summerfield from Virgin Books' New Adventures novels, and Fitz Kreiner of BBC Books' Eighth Doctor Adventures. Many other characters from the television series, including several companions of non-featured Doctors, also appeared in various stories.

Big Finish also created a number of original companions for The Monthly Adventures. These included Thomas Brewster, Marcipor, Erimem, Evelyn Smythe, Flip Jackson, Constance Clarke, Bev Tarrant, Hex, Elizabeth Klein, Liv Chenka, Sally Morgan, Lysandra Aristedes, Will Arrowsmith, C'rizz, and Mary Shelley. Some of these characters received their own audio spinoffs: Charlotte Pollard, which featured Charlotte Pollard, who was introduced as an Eighth Doctor companion in Storm Warning and later joined the Sixth Doctor at the end of The Girl Who Never Was; Graceless, which featured Abby and Zara from the arc The Key 2 Time; and Vienna, which featured Vienna Salvatori from The Shadow Heart, although it is not considered a valid source on this wiki.

The series ended in 2021 with the 275th release: The End of the Beginning.