What's New Tonight: Wednesday, May 1st.

8:00 PM EST:

“American Idol” on FOX. The Top 4 compete once again. The votes from the last episode will be combined with the votes from this episode to determine the final 3.

“Arrow” on The CW. Felicity finds some information that may aid Oliver in locating Walter. Malcolm reveals to Robert Queen and Frank Chen the details of his wife’s murder, and how that influenced his plans for the Glades.

“The Middle” on ABC. Frankie tries to help Sue’s online life by creating fake accounts to like her. Axl and Brick make a James Bond-esque film starring animals up for adoption.

“The Voice” on NBC. A best-of episode, highlighting the journey of the Top 16 and offering behind the scenes looks.

9:00 PM EST:

“Criminal Minds” on CBS. The murders of two men who were seemingly sacrificed in a ritual are investigated.

“Law & Order: Special Victims Unit” on NBC. A teenage girl is raped at a concert, but eyewitness accounts give conflicting information.

 “Supernatural” on The CW. Sam and Dean receive a distress call from Kevin Tran, which causes them to attempt to discover the Third Trial. Crowley hits a lucky streak. Castiel is on the run from Naomi and her angel minions.

10:00 PM EST:

 “CSI: Crime Scene Investigation” on CBS. At a popular spiritual retreat center, a body is discovered in one of the mud baths. Hodges has doubts about his marriage plans.

“Nashville” on ABC. Liam offers Rayna the opportunity to finish her album. Jolene suspects Dante is cheating. Teddy confronts Peggy. Tandy wants to collaborate with Coleman. Gunnar experiments with new music.

“Psych” on USA. Shawn investigates the mayor’s death and inadvertently ends up running for office.

“The Americans” on FX. Season 1 Finale. Elizabeth and Philip are instructed to attend a potentially dangerous meeting. Stan closes in on them.