Frobisher

Frobisher was a Whifferdill, a shape changer who travelled with the Sixth Doctor and Peri and then the Seventh Doctor for some time. He also encountered the Eighth Doctor.

Early Life
Frobisher became a private investigator. He was an enemy of Josiah W. Dogbolter. Frobisher was once married to another Whifferdill named Francine. Francine left him as she believed she was a better detective than him. He had another

Meeting the Doctor
Frobisher first met the Sixth Doctor when he was calling himself "Avan Tarklu". He came across the Doctor when Dogbolter placed a bounty on the Doctor. After infiltrating the TARDIS, instead of turning the Doctor in for the money, Tarklu decided that he liked the Doctor and helped him to escape yet still get the bounty money which they split evenly. (DWM: The Shape Shifter)

He then joined the Doctor on his journeys. He assumed the name of Frobisher because he felt that it sounded British and thought that the Doctor would like that. A this point he also settled on the form of a Penguin. He saved the Doctor frm drowning in the sea by hoisting him onto a rock. (DWM: Voyager)

Frobisher took on a case to investigate Arthur Gringax. (BFA: The Maltese Penguin) Frobisher and the Doctor visited Peri Brown's descendants several times. (DWMS: The Age of Chaos)

Frobisher ran a bar later, having morphed into the form of a human. He met the Eighth Doctor there but did not recognise him. He talked with the Doctor trying to find out why he looked so sad. When a robot called Zalda entered the bar, threatening to blow herself up, the Doctor convinced her otherwise. Frobisher then called for drinks on the house. When everyone had left the bar apart from his wife Caralla who worked there, he morphed back into his penguin form. (DWM: Where Nobody Knows Your Name)

Forms
Frobisher's original form is humanoid, pale yellow in color, three to four feet in height, with a round, featureless head, and wearing spectacles. After Francine left him he adopted the form of a penguin as she had been fond of that shape. He did this to remember her. (DWM: The Shape Shifter) Frobisher often adopted the form of several species of penguin. (DWM: Various comics)
 * Frobisher temporarily took on the form of the Doctor in order to investigate a murder. (A penguin detective would be shocking.) (BFA: The Maltese Penguin)

On two occasions he morphs to extend his arms to perform strong punches. (DWM: The Shape Shifter/Frobisher's Story). Frobisher later developed Mono-Morphia, this prevented him from shape-changing for some time. (DWM: Genesis!)
 * Frobisher also morphed into the form of a big cat to combat a Kymbra Chimera, he then changed into a Dinosaur. (DWM: Changes).

Frobisher stretched his penguin form to one similar to a hang-glider. He used this form to save Jamie McCrimmon. (DWM: The World Shapers)

Key Life Events

 * Marries Francine.
 * Meets the Doctor and joins him on his travels. (DWM: The Shape Shifter)
 * Adopts the name Frobisher. (DWM: Voyager)
 * Helps the Doctor pursue Astrolabus. (DWM: Voyager)
 * Leaves the Doctor.
 * Rejoins the Doctor.
 * Meets Peri. (DWM: Funhouse)
 * Helps foil the Skelatoids. (DWM: Frobisher's Story)
 * Develops Mono-Morphia. (DWM: Genesis)
 * Meets and saves the life of Jamie McCrimmon. (DWM: The World Shapers)
 * Meets Peri's descendants. (DWMS: The Age of Chaos)
 * Leaves the Doctor. (DWM: A Cold Day in Hell)
 * Marries Caralla.
 * Unknowingly meets the Eighth Doctor. (DWM: Where Nobody Knows Your Name)

Behind the Scenes

 * Frobisher has only ever appeared in comic, novel and audio adventures.
 * Robert Jezek is the voice of Frobisher who is given an American-Brooklyn style accent, he performs in this tone in BFA: The Holy Terror and The Maltese Penguin.
 * Frobisher was a companion of the Doctor before Trial of a Time Lord but is absent during the course of it. This suggests he left the Doctor but then rejoined him after as he appears in The Maltese Penguin.
 * It is unlikely Frobisher will ever return except if in a DWM comic strip.
 * It has been reported that a character by the name of Mr. Frobisher will appear in Torchwood. This could hint at a possible return.