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.
Hedin wishes to release Omega from his exile in a universe of antimatter, not realising the great Time Lord has been driven insane by his years of solitary confinement.
The Castellan kills Councillor Hedin, but this does not prevent Omega using the Arc of Infinity to seize total control of the Matrix and come to Earth.
Within a short time, the Doctor's prediction of an unstable transfer begins to come true: Omega's flesh decays and it is clear his new body is not permanent.
Story writer Johnny Byrne had some trouble at first because the producers wanted a plot that made the Amsterdam setting a key factor in the course of events, rather than him just happening to be there.
[5] It was his performance in this role (which, according to Baker, producer John Nathan-Turner repeatedly told him to "tone down") that first brought him to the attention of the production office.
Shortly after the production, the Assistant Floor Manager on the serial, Lynn Richards, invited Colin Baker to her wedding reception.
Amongst the other guests were Ron Jones, Peter Davison, Sarah Sutton, Eric Saward, John Nathan-Turner and Gary Downie.
Baker reprised the role of Maxil as an uncredited cameo in the 2006 Big Finish Productions audio play Gallifrey: Appropriation.
According to the extensive production documentation released from the archive as part of the Season 20 - The Collection Box Set in September 2023, Colin Baker was originally considered for the part of the Castellan, alongside Bernard Hepton, Derek Godfrey, Patrick Stewart, Francis Matthews, Morris Perry, Keith Michell, Terrence Hardiman, Anton Rodgers, Peter Vaughan, Edward Woodward, Charles Kay, Sean Arnold and Peter Gilmore.
Actors considered for the role of Lord President Borusa were Peter Cushing who had played 'Doctor Who' in two 1960's movies featuring The Daleks; Michael Lees, Robin Bailey, Geoffrey Bayldon, Andrew Cruickshank, John Horsley, Bernard Archard, Richard Vernon, Terence Alexander and David Langton.