1973 (production)

January

 * 2-3 January - Location filming for Planet of the Daleks took place. (REF: Doctor Who The Handbook: The Third Doctor)
 * 4-5 and 8-9 January - Pre-filming for Planet of the Daleks took place at Stage 3B of Ealing Studios. (REF: Doctor Who The Handbook: The Third Doctor)
 * 22-23 January - Studio filming for Planet of the Daleks took place at BBC Television Centre studio 4. (REF: Doctor Who The Handbook: The Third Doctor)

February

 * 5-6 February - Studio filming for Planet of the Daleks took place at BBC Television Centre studio 6. (REF: Doctor Who The Handbook: The Third Doctor)
 * 19-20 February - Studio filming for Planet of the Daleks took place at BBC Television Centre studio 3. (REF: Doctor Who The Handbook: The Third Doctor)

March

 * 12-16 and 19-20 March - Location filming for The Green Death took place. (REF: Doctor Who The Handbook: The Third Doctor)
 * 14 March - April Walker is formally contracted for the role of Sarah Jane Smith. This casting would later be dismissed (but still paid for) due to the protesting of Jon Pertwee.

April

 * 2-3, 16-17 and 29-30 April - Studio filming for The Green Death took place at BBC Television Centre studio 3. (REF: Doctor Who The Handbook: The Third Doctor)