This Christmas, celebrate the season with Andy Taylor & Co., with a 12-hour marathon of the adventures in Mayberry!
List of episodes, all times Eastern:

7am-S1E8: "Opie's Charity" (OAD: November 28, 1960)
7:30am-S1E11: "The Christmas Story" (OAD: December 19, 1960)
8am-S1E19: "Mayberry on Record" (OAD: February 13, 1961)
8:30am-S1E28: "Andy Forecloses" (OAD: April 24, 1961)
9am-S2E2: "Barney's Replacement" (OAD: October 9, 1961)
9:30am-S2E6: "Opie's Hobo Friend" (OAD: November 13, 1961)
10am-S2E11: "The Pickle Story" (OAD: December 18, 1961)
10:30am-S2E20: "Barney and the Choir" (OAD: February 19, 1962)
11am-S3E5: "The Cow Thief" (OAD: October 29, 1962)
11:30am-S3E13: "The Bank Job" (OAD: December 24, 1962)
12pm-S3E16: "Man in a Hurry" (OAD: January 14, 1963)
12:30pm-S3E25: "The Darlings Are Coming" (OAD: March 18, 1963)
1pm-S3E31: "Mountain Wedding" (OAD: April 29, 1963)
1:30pm-S4E1: "Opie the Birdman" (OAD: September 30, 1963)
2pm-S4E5: "Briscoe Declares for Aunt Bee" (OAD: October 28, 1963)
2:30pm-S4E11: "Citizen's Arrest" (OAD: December 16, 1963)
3pm-s4E16: "Barney's Sidecar" (OAD: January 27, 1964)
3:30pm-S4E17: "My Fair Ernest T. Bass" (OAD: February 3, 1964)
4pm-S4E19: "Hot Rod Otis" (OAD: February 17, 1964)
4:30pm-S4E20: "The Song Festers" (OAD: February 24, 1964)
5pm-S4E24: "Bargain Day" (OAD: March 23, 1964)
5:30pm-S5E2: "Barney's Physical" (OAD: September 28, 1964)
6pm-S5E14: "Three Wishes for Opie" (OAD: December 21, 1964)
6:30pm-S5E18: "The Rehabilitation of Otis" (OAD: January 18, 1965)