Hilarious in Hindsight: Joanna Lumley as the non canonical thirteenth Doctor almost feels like foreshadowing given the announcement in July 2017 that the canon version of the same regeneration would be played by Jodie Whittaker.
Keep Circulating the Tapes: It's on VHS, but not DVD, so it's no longer available to buy. It can be found on YouTube though. Legally, even, thanks to Comic Relief putting it on their own channel. (The BBC haven't ruled out a future DVD release but won't even consider it until all the canon episodes get DVDs first.)
Shout-Out: Etheric Beam Locators are a feature of Vogon Constructor ships according to a briefly visible graphic in the TV series of the Hitchhiker's Guide to the Galaxy.