Season 1 (1960)

7.30 avg 36 episodes 7.7 → 7.3 30 min avg

Rollercoaster

Season 1 episodes - IMDb ratings
#	Title	Rating	Votes
1	Chip Off the Old Block	7.7	160
2	The Little Ragpicker	7.6	134
3	Bub in the Ointment	6.9	111
4	Countdown	8.5	171
5	Brotherly Love	7.5	102
6	Adjust or Bust	7.0	100
7	Lady Engineer	7.5	112
8	Chip's Harvest	8.2	133
9	Raft on the River	7.5	101
10	Lonesome George	6.9	99
11	Spring Will Be a Little Late	7.6	96
12	My Three Strikers	7.1	82
13	The Elopement	7.5	87
14	Mike's Brother	7.3	92
15	Domestic Trouble	7.4	97
16	Bub Leaves Home	7.2	102
17	Mike in a Rush	7.2	104
18	The Bully	6.8	94
19	Organization Woman	7.0	90
20	Other People's Houses	7.4	94
21	The Delinquent	7.2	89
22	Man in a Trenchcoat	7.7	102
23	Deadline	7.1	101
24	The Lostling	7.5	96
25	Off Key	6.9	83
26	Small Adventure	6.6	91
27	Soap Box Derby	7.7	82
28	Unite or Sink	7.3	99
29	The Wiley Method	7.2	83
30	The National Pastime	7.0	81
31	The Croaker	7.0	77
32	The Musician	7.2	74
33	The Horseless Saddle	6.5	81
34	Trial by Separation	7.2	71
35	The Sunday Drive	7.5	86
36	Fire Watch	7.3	79

Season 2 (1961)

7.03 avg 36 episodes 6.8 → 6.6 30 min avg

Mid-peak

Season 2 episodes - IMDb ratings
#	Title	Rating	Votes
1	Birds and Bees	6.8	69
2	Instant Hate	7.4	66
3	The Crush	7.3	70
4	Tramp the Hero	6.9	73
5	A Perfect Memory	7.5	89
6	Bub's Lodge	6.4	80
7	A Lesson in Any Language	7.4	70
8	The Ugly Duckling	7.4	70
9	Chip's Composition	7.3	84
10	Mike in Charge	7.4	63
11	Bub Goes to School	6.9	69
12	Robbie's Band	6.8	70
13	Damon and Pythias	6.7	60
14	Chip Leaves Home	7.2	67
15	The Romance of Silver Pines	7.5	79
16	Blind Date	7.3	72
17	Second Time Around	6.2	73
18	The Girls Next Door	7.0	74
19	Bub Gets a Job	7.0	80
20	Le Petit Stowaway	7.6	92
21	Robbie Valentino	7.1	70
22	The Masterpiece	6.7	71
23	A Holiday for Tramp	7.2	86
24	The Big Game	6.3	68
25	Chip's Party	6.6	61
26	Casanova Trouble	7.4	69
27	The Pencil Pusher	7.6	70
28	Innocents Abroad	7.3	62
29	Robbie the Caddy	7.0	67
30	Coincidence	7.3	104
31	Air Derby	7.1	65
32	Too Much in Common	7.1	61
33	Chug and Robbie	7.0	69
34	Good Influence	6.5	66
35	The Hippopotamus Foot	6.4	70
36	The Kibitzers	6.6	59

Season 3 (1962)

6.84 avg 39 episodes 7.2 → 6.8 30 min avg

Season 3 episodes - IMDb ratings
#	Title	Rating	Votes
1	Weekend in Tokyo	7.2	69
2	Robbie's Employment Service	6.9	59
3	Tramp's First Bite	6.9	76
4	Moment of Truth	7.5	65
5	Daughter for a Day	7.1	68
6	The Ghost Next Door	7.2	75
7	Pretty as a Picture	7.3	60
8	What's Cooking?	6.9	61
9	Chip's Last Fight	6.3	61
10	Steve Gets an A	7.5	63
11	Heat Wave	7.3	63
12	The Beauty Contest	7.4	71
13	Doctor in the House	6.6	57
14	Going Steady	7.3	59
15	Mother Bub	6.4	58
16	Honorable Grandfather	6.9	60
17	How to Impress a Woman	6.6	63
18	Roman Holiday	7.4	68
19	Flashback	6.6	69
20	The Dream Book	7.2	52
21	Big Chief Bub	6.6	57
22	The Clunky Kid	6.8	55
23	Caged Fury	6.1	66
24	Make Way for Yesterday	6.6	56
25	Robbie Wins His Letter	8.0	88
26	High on the Hog	6.5	58
27	First Things First	6.9	55
28	Bub's Butler	6.8	60
29	Francesca	6.0	62
30	The Rug	6.5	57
31	The System	6.8	57
32	Let's Take Stock	6.7	54
33	Total Recall	6.5	55
34	When I Was Your Age	5.9	57
35	Chip's World	7.0	61
36	Evening with a Star	6.7	56
37	The Date Bureau	6.6	57
38	Bub's Sacrifice	6.4	63
39	Found Money	6.8	57

Season 4 (1963)

7.14 avg 37 episodes 7.1 → 7.2 30 min avg

Season 4 episodes - IMDb ratings
#	Title	Rating	Votes
1	Almost the Sound of Music	7.1	65
2	Scotch Broth	7.0	78
3	Didya Ever Have One of Those Days?	7.1	61
4	Dear Robbie	7.1	62
5	A Car of His Own	7.1	64
6	How Do You Know?	7.7	72
7	My Friend Ernie	7.7	72
8	The End of the You-Know-What	6.9	56
9	The Toupee	6.9	66
10	The Ever-Popular Robbie Douglas	6.5	51
11	The Proposals	7.1	64
12	Steve and the Viking	7.4	64
13	Par for the Course	7.3	56
14	Windfall	7.0	57
15	Top Secret	7.5	61
16	Will Success Spoil Chip Douglas?	6.9	62
17	Second Chorus	7.5	60
18	Never Look Back	7.4	57
19	Marriage by Proxy	7.1	58
20	The Chaperone	6.8	57
21	My Fair Chinese Lady	7.0	65
22	House for Sale	7.9	67
23	Stone Frog	6.8	61
24	Stage Door Bub	6.3	61
25	Fish Gotta Swim, Birds Gotta Fly	6.8	57
26	Cherry Blossoms in Bryant Park	7.4	61
27	What's the Princess Really Like?	7.5	57
28	The People's House	7.3	58
29	The Tree	8.0	65
30	The Substitute Teacher	7.6	78
31	Mike Wears the Pants	7.4	58
32	The Guys and the Dolls	7.5	82
33	The Ballad of Lissa Stratmeyer	6.1	67
34	Tramp Goes to Hollywood	6.2	63
35	Adventure in New York	7.0	57
36	Huckleberry Douglas	7.1	64
37	Guest in the House	7.2	71

Season 5 (1964)

7.06 avg 36 episodes 6.6 → 5.5 30 min avg

Season 5 episodes - IMDb ratings
#	Title	Rating	Votes
1	Caribbean Cruise	6.6	67
2	A Serious Girl	7.4	58
3	The Practical Shower	7.4	63
4	Dublin's Fair City: Part 1	7.1	72
5	Dublin's Fair City: Part 2	6.7	65
6	One of Our Moose Is Missing	7.0	52
7	Lady President	7.0	62
8	A Touch of Larceny	7.1	59
9	Goodbye Again	7.3	77
10	The Coffee House Set	7.8	71
11	The Lotus Blossom	7.2	61
12	First, You're a Tadpole	7.7	62
13	You're in My Power	6.8	64
14	The In-Law Whammy	7.2	65
15	Robbie and the Nurse	7.0	66
16	Divorce, Bryant Park Style	7.1	57
17	A Woman's Work	6.8	81
18	Here Comes Charley	7.5	69
19	Charley and the Kid	6.9	73
20	He Wanted Wings	7.0	61
21	Be My Guest	7.7	61
22	Lady in the Air	7.3	63
23	Hawaiian Cruise	7.5	65
24	The Teenagers	7.3	60
25	Mexico Ole	7.1	59
26	The Fountain of Youth	7.2	71
27	It's a Dog's Life	7.6	53
28	The Sure Thing	7.0	57
29	Chip, the Trapper	6.1	54
30	Steve and the Computer	7.0	57
31	Tramp and the Prince	6.2	60
32	Chip O' the Islands	6.7	58
33	The Glass Sneaker	7.5	68
34	All the Weddings	7.0	53
35	The Leopard's Spots	6.8	61
36	Uncle Charley and the Redskins	5.5	75

Season 6 (1965)

7.36 avg 32 episodes 7.9 → 7.9 30 min avg

Season 6 episodes - IMDb ratings
#	Title	Rating	Votes
1	The First Marriage	7.9	75
2	Red Tape Romance	7.9	69
3	Brother, Ernie	8.0	77
4	Robbie and the Chorus Girl	7.3	65
5	There's a What in the Attic?	7.4	71
6	Office Mother	6.7	56
7	Mary-Lou	7.3	59
8	Monsters and Junk Like That	7.3	62
9	Charley and the Dancing Lesson	7.5	61
10	My Son, the Ballerina	7.6	66
11	The Ernie Report	7.5	54
12	The Hong Kong Story	7.3	55
13	Marriage and Stuff	7.4	55
14	Douglas a Go-Go	7.1	54
15	Charley, the Pigeon	7.4	62
16	What About Harry?	7.7	65
17	From Maggie with Love	7.1	62
18	Robbie and the Slave Girl	7.0	64
19	Steve and the Huntress	6.7	57
20	Robbie, the College Man	7.3	58
21	Whatever Happened to Baby Chip?	7.9	70
22	Robbie and the Little Stranger	7.3	54
23	Call Her Max	6.9	63
24	Kid Brother Blues	7.1	59
25	Robbie's Double Life	7.0	58
26	Our Boy in Washington	7.1	52
27	Ernie and That Woman	7.2	58
28	The State vs. Chip Douglas	7.4	59
29	A Hunk of Hardware	7.4	52
30	The Wrong Robbie	7.3	60
31	The Wheels	7.6	60
32	London Memories	7.9	57

Season 7 (1966)

7.09 avg 32 episodes 8.2 → 6.9 30 min avg

Rollercoaster

Season 7 episodes - IMDb ratings
#	Title	Rating	Votes
1	Stag at Bay	8.2	78
2	Fly Away Home	8.1	65
3	Forget Me Not	7.2	53
4	Good Guys Finish Last	7.7	61
5	Arrivederci Robbie	6.7	55
6	If at First	7.9	67
7	Robbie's Underground Movie	7.1	58
8	Fiddler Under the Roof	6.8	50
9	Happy Birthday, World	7.2	59
10	The Awkward Age	7.7	61
11	A Real Nice Time	7.0	55
12	A Falling Star	7.5	65
13	Tramp or Ernie	6.9	52
14	Grandma's Girl	7.2	52
15	You Saw a What?	7.5	59
16	Both Your Houses	7.4	68
17	My Pal Dad	7.3	53
18	TV or Not TV	7.0	53
19	My Dad, the Athlete	7.3	54
20	The Good Earth	6.7	56
21	My Son, the Bullfighter	5.7	62
22	The Best Man	7.5	56
23	Now in My Day	7.2	53
24	Melinda	7.0	59
25	Charley O' the Seven Seas	6.7	57
26	Help the Gypsies Are Coming!	5.5	60
27	Ernie's Folly	7.2	52
28	Ernie's Crowd	7.1	54
29	Ernie and the O'Grady	5.6	47
30	The Sky Is Falling	7.2	54
31	So Long Charley, Hello	6.8	56
32	Weekend in Paradise	6.9	61

Season 8 (1967)

7.37 avg 30 episodes 8.3 → 7.4 30 min avg

Rollercoaster

Season 8 episodes - IMDb ratings
#	Title	Rating	Votes
1	Moving Day	8.3	76
2	Robbie Loves Katie	7.2	68
3	Inspection of the Groom	7.6	63
4	Countdown to Marriage	8.3	71
5	Wedding Bells	8.4	70
6	The Homecoming	7.8	65
7	My Wife, the Waitress	7.6	68
8	The Chameleon	6.8	62
9	Designing Woman	7.1	67
10	Ernie, the Bluebeard	7.1	62
11	The Heartbeat	7.2	63
12	The Computer Picnic	7.3	57
13	The Aunt Who Came to Dinner	7.2	47
14	Leaving the Nest	7.8	49
15	You're Driving Me Crazy	8.2	81
16	Liverpool Saga	8.0	87
17	The Chaperones	7.6	56
18	Green-Eyed Robbie	7.3	56
19	Charley's Tea	7.1	55
20	Ernie, the Jinx	7.2	55
21	Ernie and Zsa Zsa	6.8	65
22	A Horse for Uncle Charley	6.2	51
23	Dear Enemy	7.1	57
24	Uncle Charley's Aunt	6.2	47
25	The Standing Still Tour	7.7	52
26	Honorable Guest	7.2	54
27	The Perfect Separation	7.1	61
28	Gossip, Incorporated	7.5	57
29	The Masculine Mystique	6.9	48
30	The Tire Thief	7.4	55

Season 9 (1968)

7.20 avg 28 episodes 7.8 → 7.3 30 min avg

Rollercoaster

Season 9 episodes - IMDb ratings
#	Title	Rating	Votes
1	The Great Pregnancy	7.8	63
2	Dr. Osborne, M.D.	7.2	62
3	Life Begins in Katie	7.1	64
4	The Grandfathers	6.8	55
5	The Baby Nurse	7.5	49
6	Big Ol' Katie	7.6	59
7	My Three Grandsons	8.4	81
8	Tea for Three	7.4	55
9	Back to Earth	7.4	64
10	First Night Out	7.3	64
11	Casanova O'Casey	6.5	56
12	Expendable Katie	7.1	59
13	The New Room	7.8	67
14	The Fountain of Youth	7.3	52
15	Three's a Crowd	7.7	53
16	Chip and Debbie	7.1	55
17	What Did You Do Today, Grandpa?	6.7	72
18	Chip on Wheels	6.9	52
19	Honorable Expectant Grandfather	7.5	51
20	The Other Woman	7.3	56
21	Goodbye Forever	7.1	64
22	The O'Casey Scandal	6.5	52
23	Ernie's Pen Pal	6.8	51
24	Ernie, the Transmitter	6.9	52
25	The Matchmakers	7.2	57
26	Ernie Is Smitten	6.8	48
27	Two O'Clock Feeding	6.7	63
28	Teacher's Pet	7.3	61

Season 10 (1969)

7.53 avg 26 episodes 8.0 → 7.1 30 min avg

Rollercoaster

Season 10 episodes - IMDb ratings
#	Title	Rating	Votes
1	The First Meeting	8.0	69
2	Instant Co-Worker	8.0	69
3	Is It Love?	7.8	62
4	A Ring for Barbara	8.1	62
5	The Littlest Rebel	7.2	48
6	Two Weeks to Go	8.0	58
7	One Week to Go	7.8	57
8	Came the Day	8.1	62
9	Mexican Honeymoon	8.0	63
10	After You, Alphonse	7.9	57
11	Rough on Dodie	6.8	48
12	Silver Threads	7.5	50
13	It's a Woman's World	7.2	52
14	Table for Eight	7.3	55
15	Double Jealousy	7.8	52
16	Dodie's Tonsils	6.6	50
17	Who Is Sylvia?	7.5	53
18	You Can't Go Home	7.7	65
19	Guest in the House	7.9	60
20	Charley's Cello	6.9	48
21	The Honeymoon Is Over	7.9	56
22	Baubles, Bangles, and Beatrice	6.9	49
23	Mister X	7.0	52
24	Dodie's Dilemma	7.7	54
25	Love Thy Neighbor	7.1	63
26	J.P. Douglas	7.1	45

Season 11 (1970)

7.00 avg 24 episodes 7.9 → 7.2 30 min avg

Season 11 episodes - IMDb ratings
#	Title	Rating	Votes
1	The First Anniversary	7.9	63
2	The Once Over	7.2	50
3	The Return of Albert	7.6	57
4	The Non-Proposal	7.2	52
5	Polly Wants a Douglas	7.1	52
6	The Cat Burglars	7.4	55
7	The Elopement	7.4	59
8	The Honeymoon	7.1	56
9	One by One They Go	7.3	57
10	My Four Women	7.0	49
11	The Bride Went Home	6.8	52
12	The Power of Suggestion	6.4	49
13	St. Louis Blues	6.6	47
14	The Liberty Bell	7.2	66
15	The Love God	6.9	63
16	The New Vice-President	7.0	43
17	Robbie's Honey	7.3	48
18	Ernie Drives	7.1	46
19	Dodie Goes Downtown	6.7	55
20	The Recital	6.5	58
21	Debbie	6.6	49
22	Fit the Crime	6.4	54
23	The Return of Terrible Tom	6.0	48
24	After the Honeymoon	7.2	59

Season 12 (1971)

6.66 avg 24 episodes 6.5 → 6.1 30 min avg

Season 12 episodes - IMDb ratings
#	Title	Rating	Votes
1	The Advent of Fergus	6.5	94
2	Fergus for Sale	6.7	86
3	Lady Douglas	6.5	87
4	Goodbye Fergus	6.7	85
5	Four for the Road	5.9	55
6	Polly the Pigeon	6.2	49
7	Happy Birthday, Anyway	6.7	52
8	Proxy Parents	6.9	51
9	The Enthusiast	7.8	63
10	Katie's Career	7.3	54
11	Polly's Secret Life	6.5	53
12	The Sound of Music	7.1	50
13	TV Triplets	6.5	51
14	Three for School	6.7	50
15	Alfred	6.5	55
16	Buttons and Beaux	7.0	52
17	Peanuts	6.5	57
18	Bad Day for Steve	6.9	48
19	Second Banana	6.2	48
20	Bad Day for Barbara	7.0	46
21	The Birth of Arfie	5.4	49
22	Lonesome Katie	7.0	59
23	Barbara Lost	7.3	59
24	Whatever Happened to Ernie?	6.1	63

My Three Sons (1960)

Cast

Seasons