Dramatic season finale: Veterinarian Dr. Mertens” delights millions!
On July 5, 2025, the series “Veterinarian Dr. Mertens” celebrated its season finale at Leipzig Zoo with dramatic twists and 3.469 million viewers.

Dramatic season finale: Veterinarian Dr. Mertens” delights millions!
The popular series “Veterinarian Dr. Mertens” once again caused a stir and was able to convince its loyal audience. In the ninth season, the audience followed the exciting experiences of Susanne Mertens, who works as an assistant doctor at Leipzig Zoo. The season finale, which aired on June 24 and was titled "The Future is Unwritten," featured dramatic twists and turns, including an attack on a zookeeper and the disappearance of two crowned lemurs. However, Susanne was able to successfully save the kidnapped animals while a wedding was being celebrated at the zoo, celebrated by Matteo and Gina. These emotional moments have helped the series deliver compelling storytelling appreciated by viewers for nearly two decades. Thuringia24 reports, that the ratings for the final were 3.469 million viewers, which corresponds to a market share of 16.4 percent.
Although the series took second place behind the “Tagesschau”, the decline in viewer numbers was noticeable compared to the previous week, when 3.683 million viewers tuned in. A market share of 6.6 percent was achieved in the target group of 14 to 59 year olds. This is comparable to the series “In all friendship” (6.9 percent) and the “Tagesthemen” (7.5 percent). However, in the younger target group, 14 to 49 year olds, the series was unable to keep up with the most-watched programs of the evening, which indicates some potential for improvement. TVserien.de highlights, that ARD will now decide on a possible tenth season, which depends heavily on the ratings and viewer feedback.
Ratings and comparison to other programs
The series started its new season on Tuesday evening and reached 4.27 million viewers with a market share of 17.1 percent at 8:15 p.m. In a direct comparison, the “Tagesschau” previously had 5.84 million viewers and a market share of 23.3 percent. “Veterinarian Dr. Mertens” did well among 14 to 49-year-olds with a market share of 9.3 percent, while “In aller Friendship” finished with 17.2 percent and 4.09 million viewers. The ZDF On the other hand, his documentary “The Debt Package” only achieved 1.74 million viewers and a 7.0 percent market share, which underlines the strength of “Vet Dr. Mertens”.
The developments in audience response show that interest in the series still exists. However, it remains to be seen how the producers will respond to viewer feedback. Whether with new storylines or adaptation to younger target groups - the future of the popular series remains exciting.