The Early Adventures continued telling stories from the first two Doctors that The Companion Chronicles began, although producer David Richardson described the series as having a format closer to that of The Lost Stories "except here we have pushed the format to make these productions sound as much as possible like full cast drama".
The stories were performed with two of the original cast along with a cast sized similarly to the Doctor Who monthly range. The two original cast members performed and narrated characters such as the Doctor and other companions.
The first series consisted of four stories with the First Doctor. In stories featuring Ian Chesterton, William Russell also voiced the Doctor, while in stories featuring Steven Taylor, the Doctor was voiced by Peter Purves. Additionally, Barbara Wright was voiced by Carole Ann Ford in the first story and by Maureen O'Brien in the second, who also portrayed their traditional roles of Susan Foreman and Vicki Pallister. The last story also featured Jean Marsh as Sara Kingdom.
The second series consisted of four stories with the Second Doctor. He was voiced by Frazer Hines in all four stories, who also played his tradiional role of Jamie McCrimmon. The role of Ben Jackson was recast, now voiced by Elliot Chapman, as Michael Craze had passed away years before. The second series also featured Anneke Wills as Polly Wright for the first and second stories, Deborah Watling as Victoria Waterfield for the third story and Wendy Padbury as Zoe Heriot for the fourth.
Series three saw the return of the First Doctor. For the first two stories, the role of Barbara Wright was recast, as Jacqueline Hill was deceased. She was now voiced by Jemma Powell, who had previously played Hill in An Adventure in Space and Time. Additionally, the first story featured Ian and Susan, while the second featured Ian and Vicki. Like the first series, the third story featured Vicki and Steven, while the fourth featured Steven and Sara.
Series four featured the Second Doctor once again, accompanied by Jamie, Ben and Polly for the first three stories, and the by Jamie and Zoe in the last.
- Main article: Series 1 (EA)
|1.1||Domain of the Voord||Andrew Smith||1st||Susan, Barbara, Ian, Voords||September 2014|
|1.2||The Doctor's Tale||Marc Platt||Vicki, Barbara, Ian||October 2014|
|1.3||The Bounty of Ceres||Ian Potter||Vicki, Steven||November 2014|
|1.4||An Ordinary Life||Matt Fitton||Steven, Sara||December 2014|
- Main article: Series 2 (EA)
|2.1||The Yes Men||Simon Guerrier||2nd||Ben, Polly, Jamie||September 2015|
|2.2||The Forsaken||Justin Richards||October 2015|
|2.3||The Black Hole||Simon Guerrier||Jamie, Victoria, the Monk||November 2015|
|2.4||The Isos Network||Nicholas Briggs||Jamie, Zoe, Cybermen||January 2016|
- Main article: Series 3 (EA)
|3.1||The Age of Endurance||Nick Wallace||1st||Susan, Barbara, Ian||September 2016|
|3.2||The Fifth Traveller||Philip Lawrence||Vicki, Barbara, Ian||October 2016|
|3.3||The Ravelli Conspiracy||Robert Khan, Tom Salinsky||Vicki, Steven||November 2016|
|3.4||The Sontarans||Simon Guerrier||Steven, Sara, Sontarans||December 2016|
- Main article: Series 4 (EA)
|4.1||The Night Witches||Roland Moore||2nd||Ben, Polly, Jamie||September 2017|
|4.2||The Outliers||Simon Guerrier||October 2017|
|4.3||The Morton Legacy||Justin Richards||November 2017|
|4.4||The Wreck of the World||Timothy X. Atack||Jamie, Zoe||December 2017|