Billie Piper first graced the screen as Rose Tyler in the beloved British sci-fi series Doctor Who during its revival in 2005. Her character, a shop assistant from London, quickly became a fan favorite, captivating audiences with her adventurous spirit and deep connection to the Doctor, played by Christopher Eccleston and later by David Tennant. Piper's debut episode, Rose, introduced viewers to a new era of Doctor Who, and her chemistry with the Doctor helped redefine the show's dynamic.
However, after two seasons, Billie Piper made the difficult decision to leave the series. Her departure came in the 2006 episode Doomsday, where Rose is tragically separated from the Doctor, leaving fans heartbroken. Piper's exit was primarily due to her desire to explore other acting opportunities and to avoid being typecast in the role. Despite her departure, Rose Tyler's impact on the series remained significant, and she is often remembered as one of the Doctor's most beloved companions.
Fans have long speculated about Piper's potential return to Doctor Who. In recent years, there have been whispers of her reprising the role of Rose Tyler, especially with the show's 60th-anniversary celebrations. While Piper has expressed fondness for her time on the show, she has also indicated that any return would need to be meaningful and well-crafted.

Rose Tyler has appeared in several key episodes, including The Parting of the Ways, Doomsday, and The Stolen Earth/Journey's End. Additionally, she made a surprise return in the 2013 special The Day of the Doctor, delighting fans with her brief but impactful appearance.
As for who replaced Rose Tyler, the character of Martha Jones, played by Freema Agyeman, stepped in as the Doctor's companion following Rose's departure. Martha brought a new dynamic to the show, showcasing her own strengths and adventures alongside the Doctor.
With the ongoing evolution of Doctor Who, fans remain hopeful that Billie Piper will once again don the role of Rose Tyler, bringing back the magic that made her character so unforgettable.