Supergirl 4 - Episode 20 - Will the Real Miss Tessmacher Please Stand Up?

Part 1 

Part 2 

Kara and Lena head to Kaznia to hunt down Lex; Eve Tessmacher sets a trap that could ultimately reveal that Kara is Supergirl; Alex gets a long-awaited phone call; James practices using his powers; Ben Lockwood takes a dangerous stand inside the DEO.