Fourth Doctor

The Fourth Doctor was more Calmer, brooding and Modest, his Era went away from the UNIT era under Phillip Hinchcliffe, he mainly traveled with Emma Stanton, The UNIT Nurse appointed to watch him in his Third Incarnation. In his last Season, He traveled with Alice.

Clothing
The Fourth doctor wore a standard suit

Season 11 (1973-1974)
The Quiet Horror

The Curse of the Terromogs

The Xyvernians

Invasion of the Dinosaurs

The Star of stavana

Fear of the daleks

Season 12 (1974-1975)
Return of the sea devils

Death to the daleks

Attack of the Xyvernians

The Space Beacon

Storm of the cybermen

Terror of the zygons

Season 13 (1975-1976)
The Android Invasion

The brain of rassilon

The mausoleum of Mars

Revenge of the Pollastians

The Beasts of manzic

The Sirens of Mercury