Bestbets Crystal Reed stars in “Swamp Thing” on The CW.

2020 WORLD SERIES After a 60-game regular season and three tiers of playoffs, Major League Baseball enters its championship round as the winners of the American and National Leagues clash at Globe Life Field in Arlington, Texas, in the 2020 World Series. Last year, the Washington Nationals won their first MLB title in franchise history with their seven- game triumph over the Houston Astros. 8 p.m. on M- 15

SWAMP THING When her colleague and friend Harlan ( guest star Leonardo Nam) comes down with the “green flu,” Abby (Crystal Reed) turns Alec’s (Andy Bean) lab upside- down looking for a cure in the new episode “He Speaks.” Instead, she finds the latest supernatural reanimation from the Rot. Virginia Madsen, Henderson Wade and Derek Mears also star. (TVMA) 8 p.m. onV- 14

TELL ME A STORY Maddie (Odette Annable) begins to second- guess her imminent wedding to Tucker (Paul Wesley) as he continues to put more distance between them in the new episode “Writer’s Block.” Elsewhere, Ashley ( Natalie Alyn Lind) finds a moment of solace with Beau (Eka Darville) as she struggles to adjust to her new reality. Meanwhile, Simone ( Ashley Madekwe) attends the funeral of her estranged father and discovers that her stepmother ( Garcelle Beauvais) may be even more evil than Simone ever dared to imagine. Carrie-Anne Moss also stars. (TV14) 9 p.m. onV- 14

TRANSPLANT In the new episode “Far From Home,” an unexpected turn of events leaves Bash and Amira (Hamza Haq, Sirena Gulamgaus) in a precarious situation. Elsewhere, Theo (Jim Watson) gets a surprise visitor at home, while at work he confronts a stubborn, closed- minded patient. Language proves to be a barrier as Bash and Mags (Laurence Lebeouf ) team up to help a patient from overseas. Meanwhile, June (Ayisha Issa) comes to a decision about her relationship with Lou ( Eddie G). ( TV14) 10:01 p.m. on+- 11