| Literally, "traveling companion" | 42 |
| Launch of October 4, 1957 | 25 |
| It means "traveling companion" in Russian | 51 |
| Image on a 1957 Soviet stamp | 28 |
| First satellite | 15 |
| First man-made space satellite | 30 |
| First man-made satellite | 24 |
| First artificial satellite | 26 |
| Early space traveler | 20 |
| Realizations that changes are needed, in modern-day parlance | 60 |
| Boiler plates | 13 |
| Speak spasmodically | 19 |
| Speak explosively in anger | 26 |
| Sound of a dying engine | 23 |
| Run roughly, as an engine | 25 |
| Explosive utterance | 19 |
| Explosive popping sound | 23 |
| Be incoherent | 13 |
| Bumbled verbally | 16 |
| One who explodes vocally | 24 |
| Speaking while flurried | 23 |
| Be the least coherent? | 22 |
| Babble incoherently? | 20 |
| Speaks hastily, in a way | 24 |
| Reacts to an affront, maybe | 27 |
| Doesn't run smoothly | 24 |
| Blows up, in a sense | 20 |
| ___ Duyvil, N.Y. | 16 |
| James Bond, e.g. | 16 |
| Watch secretly | 14 |
| Security threat | 15 |
| Watch covertly | 14 |
| Observe furtively | 17 |
| Black or white Mad character | 28 |
| Work undercover | 15 |
| Person with intelligence? | 25 |
| Bug someone, e.g. | 17 |
| "Tinker, Tailor, Soldier, ___" | 40 |
| Finder of secrets | 17 |
| Engage in espionage | 19 |
| Wire wearer | 11 |
| Watch furtively | 15 |
| Use a hidden camera, say | 24 |
| Mata Hari, for one | 18 |
| He came in from the cold | 24 |
| Espionage figure | 16 |
| Cloak-and-dagger type | 21 |
| Be a mole | 9 |
| Austin Powers, e.g. | 19 |
| Work undercover, in a way | 25 |
| Work under cover | 16 |
| Unwelcome plant? | 16 |
| Telephoto-lens user, perhaps | 28 |
| Telephoto lens user, maybe | 26 |
| Secret stealer | 14 |
| Mole with secrets | 17 |
| Maxwell Smart, e.g. | 19 |
| Man of intelligence? | 20 |
| Intel collector | 15 |
| George Smiley, e.g. | 19 |
| Double agent, e.g. | 18 |
| Do some surveillance | 20 |
| Dangerous job | 13 |
| Cloak-and-dagger figure | 23 |
| Be a voyeur, perhaps | 20 |
| Alias user | 10 |
| World traveler, perhaps | 23 |
| Watch from the bushes | 21 |
| Valerie Plame, notably | 22 |
| Undercover sort | 15 |
| Tail, maybe | 11 |
| Stealth song off "Morrison Hotel" (with "The")? | 67 |
| Seek secrets | 12 |
| Seek intelligence, in a way | 27 |
| See suddenly | 12 |
| Place bugs or wires | 19 |
| Person of intelligence? | 23 |
| Perform espionage | 17 |
| One with a cover | 16 |
| One of a few Russians in 2010 news | 34 |
| Observe covertly | 16 |
| Northern ___ (apple) | 20 |
| Northern ___ (apple variety) | 28 |
| Mole, perhaps | 13 |
| Look through keyholes | 21 |
| Le Carré's Smiley, for one | 33 |
| KGB figure | 10 |
| Jason Bourne, for one | 21 |
| Intelligence seeker | 19 |
| Intelligence purveyor | 21 |
| I ____ | 6 |
| Hale, for one | 13 |
| Hale or Hari | 12 |
| Emulate a peeping Tom | 21 |
| Do undercover work | 18 |
| Covert agent | 12 |
| Bug planter | 11 |
| Bond type | 9 |
| Acquire intelligence | 20 |
| "The ___ Who Loved Me" | 32 |