All four episodes of The Highlanders are missing from the BBC Archives.  For the purposes of this marathon I viewed Loose Cannon’s reconstructions, links for which appear below.

Loose Cannon’s The Highlanders, Episode 1 Part 1

Loose Cannon’s The Highlanders, Episode 1 Part 2

Loose Cannon’s The Highlanders, Episode 2 Part 1

Loose Cannon’s The Highlanders, Episode 2 Part 2

Loose Cannon’s The Highlanders, Episode 3 Part 1

Loose Cannon’s The Highlanders, Episode 3 Part 2

Loose Cannon’s The Highlanders, Episode 4 Part 1

Loose Cannon’s The Highlanders, Episode 4 Part 2