16 March – Disgraced soap opera Neighbours producers have reported that star Beth Buchanan (sister of ex-Hey Dad star Simone) is going to leave the troubled series when her contract expires in June. As a result of Post-Neighbours, she is keen to travel overseas and is also believed to be planning a movie role.
17 March – ABC debuts a new Sunday morning children's wrapper programme called Couch Potato presented by Australian actor Grant Piro.
6 April – Network Ten's troubled soap opera Neighbours is set to lose a record number of cast members as many of them have contract renewals coming up. Ian Williams, who plays medical student Adam Willis, is confirmed to be leaving, while co-star Lucinda Cowden who plays Melanie Pearson is also believed to be quitting when their contracts expire.
30 April – ABC's live comedy series The Big Gig returns with a new series.
15 May – Canadian teen drama series Degrassi High, the third in the Degrassi trilogy series makes its debut on ABC.
30 May – A spinoff of the Australian comedy series Hey Dad...! called Hampton Court airs on Seven Network running for only one season and a total of thirteen episodes. It was later axed after the final episode on 22 August.
4 July – British long running soap opera series EastEnders airs on ABC for the very last time due to the show not getting any more episodes from the UK where it originally came from, although it was later repeated on UKTV on cable television.
16 July – Australian live comedy series The Big Gig airs its final episode on ABC.
30 July – Australian children's television series Johnson and Friends begins its broadcast in the UK for the very first time on BBC.
9 August – Final episode of the Australian children's sitcom Pugwall screens on Nine Network.
13 August – After not being shown on Australian television for two years despite being shown in the UK and Ireland, Australian children's television series Adventures on Kythera airs in Australia for the very first time on Nine Network.
7 September – Neighbours star Richard Huggett, who plays Jim Robinson's half-son Glen Donnelly has told producers that he will not be renewing his contract when it expires in November. He will be seen on air until February 1992.
7 September – Australian children's television series Johnson and Friends begins being screened for the first time in South Africa on M-Net as part of their children's block K-T.V..
19 September – Network Ten's shamed soap opera Neighbours airs a tragic episode: Joe Mangel proposes to Melanie Pearson announce they will immigrate to the UK, Adam Willis leaves Ramsay Street for Europe, Harold Bishop is murdered off the coast while on holidays with Madge to Tasmania – this was the final episode.
25 October – In Neighbours, Joe Mangel, Melanie Pearson and Sky Bishop depart.
30 October – Australian children's television series Johnson and Friends is back with a brand new series at 4:30pm on ABC.
5 November – The hit long running British science fiction series Doctor Who returns on ABC after a long absence since its last air in mid 1990, starting off with the fourth serial of Season 17Nightmare of Eden and ending with the seventh and final serial of Season 18Logopolis in early 1992. A convention of the series is also being held at the local Noah's on the Beach hotel in Newcastle, New South Wales.
6 November – Australian children's television series Johnson and Friends begins airing in Ireland on Network 2 as part of a wrapper programme children called The Den.
December – The Seven Network wins the 1991 ratings year with a record of 33.8% share for Total People. This is the fifth consecutive year the network had won in primetime.
19 December – Australian children's television series Johnson and Friends is sold to television markets across Canada for the first time ever. The first television channel to air the series in Canada was Knowledge Network in British Columbia.
27 December – Australian children's series Fat Cat and Friends airs on Seven Network for the very last time. The series was then cancelled due to the Australian Broadcasting Tribunal claiming that it was not educational enough and not clearly defined and it will might confuse young children.
This is a list of programs which made their premiere on an Australian television network that had previously premiered on another Australian television network. The networks involved in the switch of allegiances are predominantly both free-to-air networks or both subscription television networks. Programs that have their free-to-air/subscription television premiere, after previously premiering on the opposite platform (free-to air to subscription/subscription to free-to air) are not included. In some cases, programs may still air on the original television network. This occurs predominantly with programs shared between subscription television networks.