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Doctor Who Timeline

This page presents a timeline of the Doctor and his companions, focusing on the fourth Doctor era.[1] Interestingly, serial 88 was the only televised adventure in which the fourth Doctor traveled without a companion.

Season Serial Doctor Companions Number Title 11 070 The Time Warrior Third Doctor (Gallifrey male) Sarah Jane Smith (Earth female) 071 Invasion Of The Dinosaurs 072 Death To The Daleks 073 The Monster Of Peladon 074 Planet Of The Spiders 12 075 Robot Fourth Doctor (Gallifrey male) Harry Sullivan (Earth male) 076 The Ark In Space 077 The Sontaran Experiment 078 Genesis Of The Daleks 079 Revenge Of The Cybermen 13 080 Terror Of The Zygons 081 Planet Of Evil 082 Pyramids Of Mars 083 The Android Invasion 084 The Brain Of Morbius 085 The Seeds Of Doom 14 086 The Masque Of Mandragora 087 The Hand Of Fear 088 The Deadly Assassin 089 The Face Of Evil Leela (Sevateem female) 090 The Robots Of Death 091 The Talons Of Weng-Chiang 15 092 Horror Of Fang Rock 093 The Invisible Enemy K-9 Mark I (Earth robot)[2] 094 Image Of The Fendahl 095 The Sun Makers 096 Underworld 097 The Invasion Of Time 16 098 The Ribos Operation Romanadvoratrelundar, aka Romana (Gallifrey female) K-9 Mark II (Gallifrey robot)[3] 099 The Pirate Planet 100 The Stones Of Blood 101 The Androids Of Tara 102 The Power Of Kroll 103 The Armageddon Factor 17 104 Destiny Of The Daleks 105 City Of Death 106 Creature From The Pit 107 Nightmare Of Eden 108 The Horns Of Nimon 108.5 Shada 18 109 The Leisure Hive 110 Meglos 111 Full Circle Adric (Alzarius male) 112 State Of Decay 113 Warrior's Gate 114 The Keeper Of Traken Nyssa (Traken female) 115 Logopolis Tegan Jovanka (Earth female)

References: List of Doctor Who Serials K-9 Mark I was constructed by Professor Marius in the year 5000 as detailed here, using Earth technology. K-9 Mark II was constructed by the Doctor as detailed here, using Time Lord technology. Thus although cosmetically K-9 Mark II was very similar to Mark I, the features and personality of the robot were different.