The Colbert Report 11:30 p.m., Comedy Central
Normally a half-hour, “The Colbert Report” expands to an hour tonight for a visit from Paul McCartney. The supersized episode will include an interview with McCartney as well as performances of some of the Beatles and Wings songs he is currently performing on tour. The only other time Colbert expanded to an hour was in 2011, for Radiohead. By the way, Sir Kisses on the Bottom will be at Fenway Park on July 9.
Behind the Candelabra 7:30 p.m., HBO
Have you not seen this yet, set in the 1970s and ’80s? Michael Douglas is a revelation as Liberace, and I’m assuming he’ll take home an Emmy in September for his work. He doesn’t impersonate Liberace; he interprets him and gives us a strong general sense of the man. Matt Damon’s pretty good, too, as an innocent who loses himself in Liberace’s world, as is Debbie Reynolds as Liberace’s mother. HBO is reairing the film, from director Steven Soderbergh. Pictured: Douglas (left) and Damon.
Shipping Wars 10 p.m., A&E
Beckett and Castle vs. Damon and Elena.
The American Baking Competition 8 p.m., CBS
If you cough, it makes the cake taste sweeter.
I’m Having Their Baby 10 p.m., Oxygen
You’re a woman knocked up and we love what is going through ya.Matthew Gilbert can be reached at email@example.com. Follow him on Twitter @MatthewGilbert.