Arc of Infinity

123^[1] – *Arc of Infinity*
123 – Arc of Infinity
Doctor Who serial
Cast
	Doctor Peter Davison – Fifth Doctor;
	Companions Sarah Sutton – Nyssa; Janet Fielding – Tegan Jovanka;
	Others Leonard Sachs – President Borusa; Elspet Gray – Chancellor Thalia; Michael Gough – Councillor Hedin; Paul Jerricho – The Castellan; Max Harvey – Cardinal Zorac; Colin Baker – Commander Maxil; Ian Collier – Omega/The Renegade; Neil Daglish – Damon; John D. Collins – Talor; Alastair Cumming – Colin Frazer; Andrew Boxer – Robin Stuart; Maya Woolfe, Guy Groen – Hostel Receptionists; Malcolm Harvey – The Ergon;
Production
Directed by	Ron Jones
Written by	Johnny Byrne
Script editor	Eric Saward
Produced by	John Nathan-Turner
Executive producer(s)	None
Music by	Roger Limb
Production code	6E
Series	Season 20
Running time	4 episodes, 25 minutes each
First broadcast	3 January–12 January 1983
Chronology
← Preceded by; Time-Flight	Followed by →; Snakedance
	List of episodes (1963–1989)

Arc of Infinity is the first serial of the 20th season of the British science fiction television series Doctor Who, which was first broadcast in four twice-weekly parts on BBC1 from 3 to 12 January 1983.

The serial is set in Amsterdam and on the planet Gallifrey. In the serial, the Time Lord traitor Hedin (Michael Gough) seeks to bring the founder of the Time Lords Omega (Ian Collier) out of the universe of antimatter by making him bond with the body of the Fifth Doctor (Peter Davison) in the universe of matter.

^ From the Doctor Who Magazine series overview, in issue 407 (pp26-29). The Discontinuity Guide, which counts the unbroadcast serial Shada, lists this as story number 124. Region 1 DVD releases follow The Discontinuity Guide numbering system.

[1] From the Doctor Who Magazine series overview, in issue 407 (pp26-29). The Discontinuity Guide, which counts the unbroadcast serial Shada, lists this as story number 124. Region 1 DVD releases follow The Discontinuity Guide numbering system.

[1]