Doctor Who old recommendations
Season 1
An Unearthly Child: The first episode establishing the characters and TARDIS is pretty must-see. The following three episodes with cavemen, not so much.
The Daleks: Of course, the first appearance of the Daleks. Interesting in that regard, but it IS spread out over 7 episodes.
The Edge of Destruction: Bottle episode, easily skippable.
Marco Polo: In general I find the historical episodes skippable, including this one. 7 episodes, all missing/reconstructed.
The Keys of Marinus: This one seems generally unpopular, but I like it. It's a connected story but each episode has a standalone quality, so it feels much faster-paced than usual.
The Aztecs: More historical.
The Sensorites: Back to a future episode, though not really a standout.
The Reign of Terror: More historical, now in revolutionary France.
Season 2
Planet of Giants: I like this one. Their first trip back to the then-present, but for goofy sci-fi reasons they're tiny. For this show's budget, I think it's pulled off well enough.
The Dalek Invasion of Earth: We saw the Daleks last season, but here's really the Daleks we come to know as a universe-terrorizing force. Also features the first leaving of a companion. Recommended.
The Rescue: Nothing big, just a short serial as an excuse to pick up a replacement companion.
The Romans: Another historical.
The Web Planet: This one seems to get love, but the things like people in bee costumes are just TOO 60s for me to take seriously at all.
The Crusade: Another historical.
The Space Museum: A planet-sized museum, a bit of time travel weirdness, pretty good stuff.
The Chase: Another Dalek one that's pretty interesting, though this one is less cohesive and more a series of stops while being chased. Last of the original companions leave.
The Time Meddler: In the past, but not a straight historical. Though the name "Time Lord" hasn't been created yet, for the first time we see another traveler from the Doctor's people.
Season 3
Galaxy 4: There are robots that remind me of Roombas. That's about as much excitement as I can recall.
Mission to the Unknown: This is more a prelude to an upcoming serial, with none of the regulars appearing.
The Myth Makers: Another historical, this time getting involved with the Trojan War.
The Daleks' Master Plan: Interesting, but at 12 parts it seems to go on forever, and I don't like it as much as the Dalen Invasion of Earth anyway.
The Massacre of St. Bartholomew's Eve: Another historical.
The Ark: Now here's a good one. It takes place in the future and mostly on a spaceship, and there's the unusual matter of a big time jump in the middle of a story that progresses the story by generations.
The Gunfighters: Another "historical" that's mostly based on non-historical popular history of the Old West. Kind of funny to see a cheap 60s British western, but skippable.
The Savages: Another future episode, doesn't stand out much on the whole.
The War Machines: Here's a good one. Their first trip to the present at normal size, and the first time the Doctor becomes directly involved with the local authorities in trying to prevent disaster.
Season 4
The Smugglers: Another historical, dealing with pirates but taking place on land.
The Tenth Planet: The first Cybermen episode, taking place in the future! That is, 1986. The other major thing is that it ends with the first regeneration.
The Power of the Daleks: Good Dalek goings-on and the weirdeness of the Second Doctor and what his companions make of the change. Unfortunately, all episodes missing/reconstructed. It should be noted that as a rule MOST of the Second Doctor's episodes are actually missing/reconstructed.
The Highlanders: The last of the historicals.
The Underwater Menace: Nothing outstanding.
The Moonbase: I like this one. The Cybermen have changed a bit for their second appearance, and so has the Doctor, so it plays out very differently than the last time. Half the episodes missing/reconstructed.