Question: What's 2025-1975?
That's right, the answer is 50!
Kotter turns the big 5-0, so stay after class with 50 episodes with Mr. Kotter and the Sweathogs!
It starts September 9th at 6am ET.

List of episodes, all time Eastern:

September 9th-

6am-S1E3: "Welcome Back" (OAD: September 23, 1975)
6:30am-S1E1: "The Great Debate" (OAD: September 9, 1975)
7am-S1E8: "One of Our Sweathogs is Missing" (OAD: October 28, 1975)
7:30am-S1E18: "Dr. Epstein, I Presume" (OAD: January 29, 1976)
8am-S1E20: "The Telethon" (OAD: February 12, 1976)
8:30am-S2E13: "A Love Story" (OAD: December 30, 1976)
9am-S2E5: "The Museum" (OAD: October 28, 1976)
9:30am-S2E11: "Sweathog Clinic for the Cure of Smoking" (OAD: December 16, 1976)
10am-S2E18&E19: "Has Anyone Seen Arnold?" (OAD: February 3, 1977)
11am-S2E12: "Hark, the Sweatkings" (OAD: December 23, 1976)
11:30am-S2E20: "The Littlest Sweathog" (OAD: February 10, 1977)
12pm-S2E23: "I Wonder Who's Kissing Gabe Now" (OAD: March 3, 1977)
12:30pm-S2E15: "Sweatgate Scandal" (OAD: January 13, 1977)
1pm-S2E17: "Chicken à la Kotter" (OAD: January 27, 1977)
1:30pm-S3E5: "Buddy, Can You Spare a Million?" (OAD: September 29, 1977)
2pm-S3E9: "A Novel Idea" (OAD: October 27, 1977)
2:30pm-S4E11: "Frog Day Afternoon" (OAD: November 25, 1978)
3pm-S4E3: "Beau's Jest" (OAD: September 18, 1978)
3:30pm-S4E6: "The Sweatmobile" (OAD: October 9, 1978)
4pm-S4E9: "The Barbarino Blues" (OAD: November 4, 1978)
4:30pm-S4E12: "A Little Fright Music" (OAD: December 2, 1978)
5pm-S4E18: "The Sweat Smell of Success" (OAD: March 3, 1979)
5:30pm-S4E19: "The Gang Show" (OAD: March 17, 1979)
6pm-S4E23: "The Breadwinners" (OAD: June 8, 1979)
6:30pm-S1E3: "Welcome Back" (OAD: September 23, 1975)
7pm-S1E1: "The Great Debate" (OAD: September 9, 1975)
7:30pm-S1E8: "One of Our Sweathogs is Missing" (OAD: October 28, 1975)
8pm-S1E18: "Dr. Epstein, I Presume" (OAD: January 29, 1976)
8:30pm-S1E20: "The Telethon" (OAD: February 12, 1976)
9pm-S2E13: "A Love Story" (OAD: December 30, 1976)
9:30pm-S2E5: "The Museum" (OAD: October 28, 1976)
10pm-S2E11: "Sweathog Clinic for the Cure of Smoking" (OAD: December 16, 1976)
10:30pm-S2E18&E19: "Has Anyone Seen Arnold?" (OAD: February 3, 1977)
11:30pm-S2E12: "Hark, the Sweatkings" (OAD: December 23, 1976)
12am-S2E20: "The Littlest Sweathog" (OAD: February 10, 1977)
12:30am-S2E23: "I Wonder Who's Kissing Gabe Now" (OAD: March 3, 1977)
1am-S2E15: "Sweatgate Scandal" (OAD: January 13, 1977)
1:30am-S2E17: "Chicken à la Kotter" (OAD: January 27, 1977)
2am-S3E5: "Buddy, Can You Spare a Million?" (OAD: September 29, 1977)
2:30am-S3E9: "A Novel Idea" (OAD: October 27, 1977)
3am-S4E11: "Frog Day Afternoon" (OAD: November 25, 1978)
3:30am-S4E3: "Beau's Jest" (OAD: September 18, 1978)
4am-6am ET: Paid Programming

September 10th-

6am-S4E6: "The Sweatmobile" (OAD: October 9, 1978)
6:30am-S4E9: "The Barbarino Blues" (OAD: November 4, 1978)
7am-S4E12: "A Little Fright Music" (OAD: December 2, 1978)
7:30am-S4E18: "The Sweat Smell of Success" (OAD: March 3, 1979)
8am-S4E19: "The Gang Show" (OAD: March 17, 1979)
8:30am-S4E23: "The Breadwinners" (OAD: June 8, 1979)

Watch Welcome Back, Kotter weekdays at 11am ET and Saturdays from 11pm-1am ET on Rewind TV.

I wonder how much of season 4 makes it in.

I wonder how much of season 4 makes it in.
To answer your question, 8 episodes of S4 will air in the marathon, and those same 8 episodes will air again the next day.

So it’s 50 episodes but not 50 DIFFERENT episodes.

And in the end I totally forgot about it and didn't see a second :shrug:

And in the end I totally forgot about it and didn't see a second :shrug:
If it makes you feel better, I didn't see it either because I was too busy to watch on that day.