TV Mission: Impossible - Season 1 Episode 21 : Snowball in Hell Mission: Impossible - Season 1 Episode 21 : Snowball in Hell 7.559/10 by 305 users A former prison guard, Sefra, has got hold of a supply of cesium 138, which explodes at temperatures above 70 degrees. Sefra plans to sell the sample and the formula from the closed-down prison base where he once worked. Rollin and Barney go in as a photographer and model respectively, and Sefra ""learns"" that Barney is a former prisoner returning for revenge. The team fakes a generator break down while Sefra beats Barney, and the cesium starts to heat up. Sefra has it taken to a nearby hospital refrigerator, where the IMF makes the switch. When Sefra discovers the missing jar, he forces Barney to show him the escape route which he supposedly used to escape. As Sefra makes his own escape, the IMF send the cesium sample toward him on a remote-controlled mini-tank, and it blows up, killing Sefra and making sure no one gets the formula or the sample. Details Casts Posters Images Title Mission: Impossible - Season 1 Episode 21 : Snowball in Hell Alternative Titles 碟中谍 First Air Date 1966-09-17 Last Air Date 1973-03-30 Number of Episodes 171 Number of Seasons 7 Genres Action & Adventure, Crime, Drama, Networks CBS, Casts Peter Graves, Greg Morris, Peter Lupus, Lynda Day George, Bob Johnson Plot Keywords , Jim Phelps Peter Graves Barney Collier Greg Morris Willy Armitage Peter Lupus Dana Lambert Lynda Day George Man on Tape (voice) Bob Johnson Episodes List Mission: Impossible Season 1 :Episode 1 Pilot Pilot 1966-09-17 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 2 Memory Memory 1966-09-24 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 3 Operation Rogosh Operation Rogosh 1966-10-01 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 4 Old Man Out (1) Old Man Out (1) 1966-10-08 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 5 Old Man Out (2) Old Man Out (2) 1966-10-15 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 6 Odds on Evil Odds on Evil 1966-10-22 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 7 Wheels Wheels 1966-10-29 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 8 The Ransom The Ransom 1966-11-05 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 9 A Spool There Was A Spool There Was 1966-11-12 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 10 The Carriers The Carriers 1966-11-19 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 11 Zubrovnik's Ghost Zubrovnik's Ghost 1966-11-26 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 12 Fakeout Fakeout 1966-12-03 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 13 Elena Elena 1966-12-10 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 14 The Short Tail Spy The Short Tail Spy 1966-12-17 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 15 The Legacy The Legacy 1967-01-07 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 16 The Reluctant Dragon The Reluctant Dragon 1967-01-14 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 17 The Frame The Frame 1967-01-21 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 18 The Trial The Trial 1967-01-28 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 19 The Diamond The Diamond 1967-02-04 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 20 The Legend The Legend 1967-02-11 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 21 Snowball in Hell Snowball in Hell 1967-02-18 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 22 The Confession The Confession 1967-02-25 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 23 Action! Action! 1967-03-04 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 24 The Train The Train 1967-03-18 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 25 Shock Shock 1967-03-25 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 26 A Cube of Sugar A Cube of Sugar 1967-04-01 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 27 The Traitor The Traitor 1967-04-15 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of... Mission: Impossible Season 1 :Episode 28 The Psychic The Psychic 1967-04-22 Mission: Impossible is an American television series that was created and initially produced by Bruce Geller. It chronicles the missions of a team of...