I'm basing this purely on what I recall of the programmes (and YouTube clips). The TV Tropes page says there were spinoff books, which may contradict some of my answers, but I haven't seen those so I assert they aren't canon.
a) His catchphrase.
b) Sometimes, I think he overdoes the slow, significant aspect of his closing monologues. But your mileage may vary.
c) In his own verse, he's an older mentor figure, and they don't normally get the girl. But I wouldn't put it past him to be spending some quality time with Lilith. "Well met, my lady. Once more, it seems, the time has come for you to test your fortitude against the might of my staff..."
d) A skeptic in the Scully mould. Perhaps T'Pol. "The Vulcan Science Directorate has determined that magic is impossible." "Indeed? Then let them explain this. Spell-casting: D. I. S. R. O. B. E."
e) Most of the neat crossovers I can think of would involve characters from the other universe turning up at Knightmare Castle (eg: Sam Tyler as dungeoneer with Gene, Annie and Ray advising). But if the requirement was to send him elsewhere, Babylon 5 uses a lot of high-fantasy tropes so he'd probably feel quite at home. How long Sheridan and Ivanova would put up with him saying "Warning, team!" to them is another matter entirely.
f) Most of the inhabitants of the dungeon, but I really don't see him settling down with Lord Fear's reptilian sidekick. Lissard, I think the name was.
h) "Ye true and honeʃt accounte of how I, Treguard of Dunʃhelm, came to be maʃter of Knightmare Caʃtle; and of ye many curious adventures that tooke place therein." It would be the publisher who retitled it to "Ooh, nasty!"
i) A prophecy of doom. Which may be why he invites dungeoneers into his castle in the first place; he's looking for the Chosen One foretold in such a prophecy.
j) The fact that he's an older mentor figure pretty much dictates that one day he'll sacrifice himself fighting against impossible odds while his newest apprentice escapes (and later avenges him). I think we can guess what his last words will be, too.
no subject
a) His catchphrase.
b) Sometimes, I think he overdoes the slow, significant aspect of his closing monologues. But your mileage may vary.
c) In his own verse, he's an older mentor figure, and they don't normally get the girl. But I wouldn't put it past him to be spending some quality time with Lilith. "Well met, my lady. Once more, it seems, the time has come for you to test your fortitude against the might of my staff..."
d) A skeptic in the Scully mould. Perhaps T'Pol. "The Vulcan Science Directorate has determined that magic is impossible." "Indeed? Then let them explain this. Spell-casting: D. I. S. R. O. B. E."
e) Most of the neat crossovers I can think of would involve characters from the other universe turning up at Knightmare Castle (eg: Sam Tyler as dungeoneer with Gene, Annie and Ray advising). But if the requirement was to send him elsewhere, Babylon 5 uses a lot of high-fantasy tropes so he'd probably feel quite at home. How long Sheridan and Ivanova would put up with him saying "Warning, team!" to them is another matter entirely.
f) Most of the inhabitants of the dungeon, but I really don't see him settling down with Lord Fear's reptilian sidekick. Lissard, I think the name was.
g) "Der, welcher wandert diese Strasse voll Beschwerden" (He who wanders these difficult paths) from Mozart's The Magic Flute.
h) "Ye true and honeʃt accounte of how I, Treguard of Dunʃhelm, came to be maʃter of Knightmare Caʃtle; and of ye many curious adventures that tooke place therein." It would be the publisher who retitled it to "Ooh, nasty!"
i) A prophecy of doom. Which may be why he invites dungeoneers into his castle in the first place; he's looking for the Chosen One foretold in such a prophecy.
j) The fact that he's an older mentor figure pretty much dictates that one day he'll sacrifice himself fighting against impossible odds while his newest apprentice escapes (and later avenges him). I think we can guess what his last words will be, too.