That is a great show!!! Look at the aired versions in aired order first {Except the episodes The General & Dance of the Dead}. Save the {Original} version of "Chimes" as an extra for later on. The aired versions better set the tone and continuity by using the same music and intro pattern.

Arrival {Aired Version}
Dance of the Dead*
The Chimes of Big Ben {Aired Version}
The General*
A. B. and C.
Free For All
The Schizoid Man
Many Happy Returns
Checkmate
Hammer Into Anvil
It's Your Funeral
A Change of Mind
Do Not Forsake Me Oh My Darling
Living in Harmony
The Girl Who Was Death
Once Upon a Time
Fall Out

Extra:
Arrival {Original}
The Chimes of Big Ben {Original Version}

Be seeing you.