Karfel

Karfel was a planet inhabited by near-humans known as Karfelons.

Astronomical Data
Karfel had diplomatic relationships with the planet of the Bandrils. A council, located in the Citadel, governed life on Karfel. (DW: Timelash)

Somewhere on the planet was a leisure garden with singing plants. (SJA: Death of the Doctor)

History
The Third Doctor first visited the planet with Jo Grant (DW: Timelash) and Mike Yates. Originally they meant to simply have dinner there but spent a much longer time. (MA: Speed of Flight) Jo also visisted a leisure garden with singing plants. (SJA: Death of the Doctor)

During this visit, a local artist painted a mural of the Third Doctor in the Citadel. Jo gave a locket containing a photo of herself to the father of a Karfelon named Katz. The Doctor reported to the local authorities the "unethical" experiments of a scientist named Megelen on a local life form called Morloxes.

The Sixth Doctor's TARDIS became trapped by a kontron tunnel and landed on Karfel once again. By this time, Megelen, as the Borad, now ruled the planet as a dictator with the aid of androids. The Borad created the kontron tunnel, which he called the Timelash and used it as a means to exile his enemies.

With his companion Peri and a young H. G. Wells, the Doctor freed Karfel of the Borad and averted a war with the Bandrils. (DW: Timelash)