What to Watch: April 20

'16 & Pregnant' (10PM, MTV) season 2 finale
Season two's teen mamas have been just as memorable as season one's, and tonight the sophomore season comes to a close with the story of Kailyn, a teen mom who'd already had more than her share of hard knocks before she got pregnant. Estranged from her father, Kailyn's mother also abandons her when she announces she's having a baby, leaving Kailyn to move in with her boyfriend Jonathan's family. Jonathan, like so many of the baby daddies this season, is also less than supportive. And speaking of the teen dads, after the finale, Dr. Drew Pinsky hosts '16 & Pregnant: Life After Labor' (11PM), where we'll catch up with the season two teen moms and dads, including Nikkole and Josh, one of the most obnoxious, immature, jerky teen dads ever, who again squares off with Nikkole's mom.'16 & Pregnant' (10PM, MTV) season 2 finale
Season two's teen mamas have been just as memorable as season one's, and tonight the sophomore season comes to a close with the story of Kailyn, a teen mom who'd already had more than her share of hard knocks before she got pregnant. Estranged from her father, Kailyn's mother also abandons her when she announces she's having a baby, leaving Kailyn to move in with her boyfriend Jonathan's family. Jonathan, like so many of the baby daddies this season, is also less than supportive. And speaking of the teen dads, after the finale, Dr. Drew Pinsky hosts '16 & Pregnant: Life After Labor' (11PM), where we'll catch up with the season two teen moms and dads, including Nikkole and Josh, one of the most obnoxious, immature, jerky teen dads ever, who again squares off with Nikkole's mom.

'The Biggest Loser' – A trip to the beach is anything but relaxing as the contestants hit the sand for a taxing workout with volleyball champ Gabrielle Reece. (8PM, NBC)

'Glee' – Don't go for second best, baby, put your Madonna love to the test with this Material Girl-themed installment, featuring Madonna tunes like 'Vogue,' 'Like a Virgin,' 'Borderline' and 'Like a Prayer' (9PM, Fox)

'Lost' – Jack and his crew merge with the Locke-ness monster and his crew, while the flashforward/backwards/sideways also revolves around Mr. Shephard (9PM, ABC)

'Future Food' – And for the Moto food magicians' next trick: Attempting to end world hunger with an invention they dub the "Miracle Fruit." (10PM, Planet Green)

'Justified' – A rich horse breeder appears to have committed suicide, but Rayland is shrewdly suspicious of the dude's wife, who won't stop flirting with him. (10PM, FX)