Exhaustion and pain really set in for adult Nikki during mile 18 of the Providence Marathon while a slightly younger Nikki attempts to send a message to her father via paper airplane.

This episode is narrated by Nikki MacCallum and features Dina Laura (Mom), Patrick McCartney (Dad), and Kelvin Moon Loh (Parking Attendant II). 

At mile 17 of the Providence Marathon, Nikki experiences chaffing while a younger Nikki runs on a treadmill.

This episode is narrated by Nikki MacCallum.

At mile 16, adult Nikki runs by the ocean while twenty-five-year-old Nikki celebrates her twenty-third birthday and gets a letter from her father before bumping into him on the Cape Cod Canal. 

This episode is narrated by Nikki MacCallum and features Dina Laura (Mom), Patrick McCartney (Dad), Anne Nathan (Aunt Moira), Kristen Cook (Charlotte), and Cooper Grodin (Uncle Dale). 

Adult Nikki pushes through mile 15 of the Providence Marathon, while back from Puerto Rico, a younger Nikki goes on a bender. 

This episode is narrated by Nikki MacCallum and features Dina Laura (Mom), James Jelkin (Taxi Cab Driver), and Haulston Mann (Bartender). 

Adult Nikki recognizes some runners from the starting line at mile 14 of the Providence Marathon while Nikki in her early twenties heads to meet her family in Puerto Rico.

This episode is narrated by Nikki MacCallum and features Dina Laura (Mom), and Patrick McCartney (Dad).

During mile 13 of the Providence Marathon, Nikki finally passes the bikers while on summer break, a college age Nikki vacations at CWTF. 

This episode is narrated by Nikki MacCallum and features Dina Laura (Mom), Patrick McCartney (Dad), Kristen Cook (Charlotte), Anne Nathan (Aunt Moira), and Rachel Lenihan (Aunt Donna).

Adult Nikki runs up a bike path at mile 12 of the Providence Marathon while back at college, a younger Nikki confides in Eric for the first time. 

This is episode is narrated by Nikki MacCallum and features Justy Kosek (Italian Waiter), Joel Waggoner (Eric), Sophie Sumner (Dr. Miller), and Patrick McCartney (Dad). 

Adult Nikki contemplates holidays past as she runs mile 11 of the Providence marathon while a college age Nikki deals with the aftermath of her father's relapse.

This episode is narrated by Nikki MacCallum and features Dina Laura (Mom), Patrick McCartney (Dad) and Charly Clive (Nurse Cindy).

Adult Nikki crosses into the double digits of the Providence Marathon while Nikki the college sophomore discovers beer cans under the bunny cages during a Thanksgiving trip home.

This episode is narrated by Nikki MacCallum and features Patrick McCartney (Dad), Dina Laura (Mom), and Brandon James Gwinn (Parking Attendant Paul).

Adult Nikki pushes through mile 9 of the Providence Marathon, while a high-school aged Nikki prepares for her grandmother's funeral and relives the first time she ever experienced anxiety at an audition. 

Narrated by Nikki MacCallum, this episode features Dina Laura (Mom,) Anne Nathan (Aunt Moira), Patrick McCartney (Dad), Rachel Lenihan (Aunt Donna), Matthew Friedman (Rabbi Feldman), Laura Cantwell (Soprano Girl), and William Oscar Cohen (District Audition Announcer).