Pam Grier is back as Amanda Waller who wants the list of names in Justice League of America and uses Chloe as hostage.
"Smallville" welcomes back Checkmate's leader Amanda Waller who was first introduced in "Absolute Justice". Tess creates an elaborate hoax in order to kidnap Green Arrow, and delivers him to Waller (guest star Pam Grier), who tells him that that the government is recruiting him to serve his country.
However, Green Arrow escapes before they can reveal his identity. After Oliver brings Clark and Chloe up to speed, the three investigate and Clark is surprised to find John Jones (guest star Phil Morris) investigating Oliver's kidnapping too. Clark senses that John is keeping information from him.
Oliver and Clark are shocked when Tess reveals that Amanda is after something called "Watchtower." Waller threatens to kill Chloe unless Clark gives her the names and locations of the rest of the Justice League.
"Checkmate" airs on April 9.