Uncle Monty was a contender for the role when Tom Baker announced he was leaving.
(
Captain Howdy,
Thu 14 Aug 2014, 11:46,
archived)
And (unrelated to Withnail&I) BRIAN BLESSED could've been Doc #2, which would have been awesome(
Tribs 🦇 ↓ dn ʎɐʍ sᴉɥʇ ↓🦇,
Thu 14 Aug 2014, 12:09,
archived)