A few more Doctor Who ones:
Sylvestor McCoy and Sophie Aldred in Death Comes To Time, which is a different 'ending' for the Seventh Doctor. Also those unofficial audio dramas where they were the "Professor" and Ace.
Richard Grant played a Doctor in both the official but no longer canon Scream Of The Shalka and the spoof Curse of Fatal Death.
Derek Jacobi has played two "Good" Masters in two continuities-the Master robot in Scream of The Shalka, and also Professor "Yana" in the TV series.
Carole Ann Ford as Susan in both the Tv series and in an Unbound audio as an alternate Susan.
Nicholas Courtney as the Brigidiar in the TV series and in unbound. Also, he had a turn as an alternate universe "Brigade Leader" in Inferno.
Lalla Ward as "The Mistress" when she's obviously intended to be Romana (Also in audios).
Also Colin Baker and Nicola Bryant in "The Stranger"-although that's stretching it a bit.
Sylvestor McCoy and Sophie Aldred in Death Comes To Time, which is a different 'ending' for the Seventh Doctor. Also those unofficial audio dramas where they were the "Professor" and Ace.
Richard Grant played a Doctor in both the official but no longer canon Scream Of The Shalka and the spoof Curse of Fatal Death.
Derek Jacobi has played two "Good" Masters in two continuities-the Master robot in Scream of The Shalka, and also Professor "Yana" in the TV series.
Carole Ann Ford as Susan in both the Tv series and in an Unbound audio as an alternate Susan.
Nicholas Courtney as the Brigidiar in the TV series and in unbound. Also, he had a turn as an alternate universe "Brigade Leader" in Inferno.
Lalla Ward as "The Mistress" when she's obviously intended to be Romana (Also in audios).
Also Colin Baker and Nicola Bryant in "The Stranger"-although that's stretching it a bit.