Below is a list of the episodes aired in the United States, grouped by the sagas the English Dub is grouped in. I don't have episode summaries here, though. Just the titles. And most of these episodes either are are soon will be available for purchase at your local video store, Amazon.com, or The Official DBZ Website.
The Saiyan Saga | The Namek Saga | The Ginyu Saga | The Frieza Saga
The Garlic Junior Saga | The Trunks
Saga | The Android Saga
The Imperfect Cell Saga | The Perfect
Cell Saga | The Cell Games
The Saiyan Saga
1) The Arrival of Radditz
2) The World's Strongest Team
3) Gohan's Hidden Power
4) Goku's Unusual Journey
5) Gohan's Metamorphosis
6) Gohan Makes a Friend
7) Trouble on Arlia
8) Home for Infinite Losers
9) Princess Snake's Hospitality
10) Escape from Piccolo
11) Showdown in the Past
12) The End of Snake Way
13) A Fight Against Gravity... Catch Bubbles!
14) The Legend of the Saiyans
15) Black Day for the Planet Earth
16) The Battle Begins... Goku, Where are You?
17) The Saibamen Strike
18) Nappa... the Invincible?
19) Tien Goes All Out!
20) Time's Up!!
21) The Return of Goku
22) Goku Strikes Back
23) Goku VS Vegeta... A Saiyan Duel
24) Vegeta... Saiyan Style!
25) Stop Vegeta Now!!
The Namek Saga
26) Battle's End
27) A New Goal... Namek!
28) A Journey to Namek
29) Friends or Foes?!
30) Hunt for a Dragonball
31) Who's Who?
32) Touchdown on Namek
33) Face off on Namek
34) The Ruthless Frieza
35) The Nameks VS Frieza
36) Escape from Dodoria
37) Secrets Revealed
38) A Collision Course
39) Stay Away from Frieza
40) Zarbon Transformed
41) The Eldest Namek
42) Get Vegeta!
43) Vegeta Revived
44) A Heavy Burden
45) Immortality Denied
46) Big Trouble for Bulma
47) Scramble for the Dragonballs
48) Arrival of the Ginyu Force
49) Elite Fighters of the Universe... The Ginyu Force
50) Time Tricks and Body Binds
51) No Refuge from Recoome
52) Enter Goku
53) Goku... Super Saiyan?
54) Ginyu Assault
55) Incredible Force
56) Frieza Approaches
57) Goku is Ginyu and Ginyu is Goku
58) Calling the Eternal Dragon
59) Gohan Defeat Your Dad!!
60) Captain Ginyu... the Frog
61) The Password is Porunga
62) Piccolo's Return
63) The Fusion
64) Fighting Power... One Million??
64b) Gohan Attacks
65) Piccolo the Super Namek
66) Deja Vu
67) Frieza's Second Transformation
68) Another Transformation?
69) Dende's Demise
70) The Renewed Goku
71) The End of Vegeta
72) The Ultimate Battle
73) Clash of the Super Powers
74) Frieza's Boast
75) Bold and Fearless
76) Embodiment of Fire
77) Trump Card
78) Keep the Chance Alive
79) Power of the Spirit
80) Transformed at Last
81) Explosion of Anger
82) Namek's Destruction
83) A Final Attack
84) Approaching Destruction
85) Gohan Returns
86) The Last Wish
87) Duel on a Vanishing Planet
88) Pathos on Frieza
89) Frieza Defeated!!
90) Mighty Blast of Rage
91) Namek's Explosion... Goku's End?
92) Goku's Alive!!
93) The Heavens Tremble
94) Black Fog of Terror
95) Battle in Kami's Lookout
96) Fight with Piccolo
97) Call for Restoration
98) Suicidal Course
99) Extreme Measures
100) The World Awakens
101) Brief Chance for Victory
102) Krillin's Proposal
103) Frieza's Counterattack
104) The Mysterious Youth
105) Another Super Saiyan?
106) Welcome Back, Goku
107) Mystery Revealed
108) Goku's Special Technique
109) Z-Warriors Prepare
110) Goku's Ordeal
111) The Androids Appear
112) A Handy Trick
113) Double Trouble for Goku
114) Upgrade to Super Saiyan
115) The Secret of Dr. Gero
116) More Androids?
117) Follow Dr. Gero
118) Nightmare Comes True
119) Goku's Assassin
120) Deadly Beauty
121) No Match for the Androids
122) Last Ditch Effort
123) Closing In
124) Unwelcome Discovery
125) Seized with Fear
126) The Reunion
127) Borrowed Powers
128) His Name is Cell
129) Piccolo's Folly
130) Laboratory Basement
131) Our Hero Awakes
132) Time Chamber
133) The Monster is Coming
134) He's Here
135) Up to Piccolo
136) Silent Warrior
137) Say Goodbye, 17
138) Sacrifice
139) Saiyans Emerge
140) Super Vegeta
141) Bow to the Prince
142) Hour of Temptation
143) Krillin's Decision
144) The Last Defense
145) Cell is Complete
146) Vegeta Must Pay
147) Trunks Ascends
148) Saving Throw
149) Ghosts from Tomorrow
150) The Cell Games
151) What is the Tournament?
152) The Doomsday Broadcast
153) Meet Me in the Ring
154) No Worries Here
155) A Girl Named Lime
156) Memories of Gohan
157) A New Guardian
158) Dende's Dragon
159) The Puzzle of General Tao
160) The Games Begin
161) Losers Fight First
162) Goku VS Cell
163) Cell's Bag of Tricks
164) No More Rules
165) The Fight is Over
166) Faith in a Boy
167) Gohan's Desperate Plea
168) Android Explosion
169) Children of Cell
170) The Unleashing
171) The Unstoppable Gohan
172) Cell's Mighty Breakdown
173) A Hero's Farewell
174) Cell Returns
175) The Horror Won't End
176) Saving the World
177) Goku's Noble Decision
178) One More Wish
179) Free the Future
Coming soon... Heaven's Tournament
